{"title":"Exhaust System","description":null,"products":[{"product_id":"sierra-18-0102-water-passage-cover-gasket-replaces-omc-322858-for-johnson-evinrude-outboard-motors","title":"Sierra Inner Exhaust Cover Gasket 18-0102, Replaces OMC 326264, for Johnson\/Evinrude Outboard Motors","description":"\u003cp\u003eThe Sierra 18-0102 is an inner exhaust cover gasket built for Johnson and Evinrude outboard motors. It seals the inner exhaust cover against the powerhead, preventing exhaust leaks and maintaining proper cooling water and exhaust routing through the outboard's exhaust housing. This gasket is a direct replacement for OMC part number 326264, letting you restore a factory-tight seal without sourcing the original OMC part.\u003c\/p\u003e\u003cp\u003eThe gasket is finished in white and is sold individually (package quantity of 1), so you can order exactly the quantity your job requires. It is manufactured in the United States and carries Sierra's limited warranty. As with any exhaust or cover gasket, this is a wear item that should be replaced any time the inner exhaust cover is removed, since reusing an old gasket risks an incomplete seal and exhaust or water leakage.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-0102\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Inner Exhaust Cover Gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReplaces (OEM):\u003c\/strong\u003e 326264\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e White\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity:\u003c\/strong\u003e 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999750853\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.1 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e United States\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits Outboard Brands:\u003c\/strong\u003e Johnson, Evinrude\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eFits Johnson and Evinrude outboard motors.\u003c\/p\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cp\u003e326264\u003c\/p\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-0102 gasket fit?\u003c\/strong\u003e The Sierra 18-0102 inner exhaust cover gasket is designed to fit Johnson and Evinrude outboard motors.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part number does 18-0102 replace?\u003c\/strong\u003e Sierra 18-0102 replaces OMC part number 326264, so it can be used as a direct substitute for that original equipment gasket.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many gaskets come in a package?\u003c\/strong\u003e Each package of the Sierra 18-0102 contains a single gasket (package quantity of 1).\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-0102 gasket weigh?\u003c\/strong\u003e It weighs 0.1 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color is the 18-0102 gasket?\u003c\/strong\u003e This gasket is white.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhere is the Sierra 18-0102 gasket made?\u003c\/strong\u003e It is manufactured in the United States.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-0102 an OEM part or an aftermarket replacement?\u003c\/strong\u003e It is a Sierra aftermarket gasket manufactured to replace OMC part number 326264, not an original OMC-branded part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhere on the outboard is this gasket installed?\u003c\/strong\u003e The 18-0102 is an inner exhaust cover gasket, used to seal the inner exhaust cover on Johnson and Evinrude outboard motors.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eShould I reuse my old exhaust cover gasket when servicing the outboard?\u003c\/strong\u003e No. Once the inner exhaust cover is removed, the old gasket should be replaced with a new Sierra 18-0102 to maintain a proper seal.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the Sierra 18-0102 come with a warranty?\u003c\/strong\u003e Yes, it is covered by Sierra's limited warranty.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988012806363,"sku":"SIE-18-0102","price":10.45,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-0102_lg__45622.1558119955.500.750.jpg?v=1785188774"},{"product_id":"exhaust-elbow-gasket-2-pack-replaces-omc-907764-fits-omc-exhaust-manifolds","title":"Sierra Exhaust Elbow Gasket, Replaces OMC 907764, 2-Pack (18-0104-9)","description":"\u003cp\u003eThe Sierra Exhaust Elbow Gasket (18-0104-9) seals the exhaust elbow on OMC exhaust manifold assemblies, providing the gasket surface needed between the elbow and manifold to prevent exhaust and water leakage at the joint. This gasket is sold as a 2-pack, so buyers get a matched pair for the job in a single purchase rather than ordering individual gaskets separately. It directly replaces OEM number 907764, making it a straightforward drop-in choice for anyone servicing an OMC exhaust manifold and needing the correct elbow gasket without hunting down the original part. Because it is designed specifically for this application, it is sized and shaped to seat correctly against the mating surfaces of the exhaust elbow and manifold, supporting a proper seal when reassembled with correct torque on the mounting fasteners. At just 0.04 pounds, the gasket set is light and easy to handle, ships compactly, and is inexpensive to keep on hand as a maintenance spare. Whether replacing a gasket that has hardened, cracked, or begun to leak with age and heat cycling, or performing a routine exhaust elbow removal for inspection or cleaning, this gasket restores the seal needed for proper operation.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-0104-9\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Name:\u003c\/strong\u003e Exhaust Elbow Gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity:\u003c\/strong\u003e 2 gaskets per pack\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e OMC exhaust manifolds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.04 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282161279\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eFits OMC exhaust manifold applications using the 907764 exhaust elbow gasket.\u003c\/p\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e907764\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-0104-9 exhaust elbow gasket fit?\u003c\/strong\u003e The Sierra 18-0104-9 exhaust elbow gasket is designed for OMC exhaust manifold applications, sealing the joint between the exhaust elbow and the manifold.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many gaskets come in one pack of 18-0104-9?\u003c\/strong\u003e This listing includes 2 exhaust elbow gaskets per pack, so you get a matched pair in a single order.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes 18-0104-9 replace OEM part number 907764?\u003c\/strong\u003e Yes, the Sierra 18-0104-9 gasket is a direct replacement for OEM number 907764.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra exhaust elbow gasket weigh?\u003c\/strong\u003e The 18-0104-9 gasket set weighs 0.04 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this gasket made by Sierra or is it a generic aftermarket part?\u003c\/strong\u003e It is manufactured by Sierra under part number 18-0104-9, sold as a direct replacement for the OMC exhaust elbow gasket.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen would I need to replace an exhaust elbow gasket like this one?\u003c\/strong\u003e An exhaust elbow gasket such as the Sierra 18-0104-9 should be replaced when the old gasket has hardened, cracked, or is leaking exhaust or water at the elbow-to-manifold joint, or any time the exhaust elbow is removed for service.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-0104-9 exhaust elbow gasket?\u003c\/strong\u003e The UPC for this 2-pack of Sierra exhaust elbow gaskets is 808282161279.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I buy just one exhaust elbow gasket instead of a 2-pack?\u003c\/strong\u003e This Sierra part, 18-0104-9, is sold and priced as a 2-pack, providing two gaskets in each order.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the 18-0104-9 gasket seal properly on an OMC exhaust manifold without modification?\u003c\/strong\u003e Yes, the 18-0104-9 gasket is sized for OMC exhaust manifold applications and is intended to seat directly against the elbow and manifold mating surfaces without modification.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the Sierra 18-0104-9 gasket cross-reference to any other part number?\u003c\/strong\u003e Yes, it cross-references to OEM number 907764.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988018016475,"sku":"SIE-18-0104-9","price":4.52,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-0104_lg__25732.1558120150.500.750.jpg?v=1785329158"},{"product_id":"sierra-shieldsflex-ii-marine-water-exhaust-hose-with-wire-available-in-5-8-to-3-id","title":"Sierra Shieldsflex II Marine Water\/Exhaust Hose - Available in 5\/8\" to 3\" ID","description":"\u003cp\u003eSierra Shieldsflex II is a wire-reinforced marine water and exhaust hose built for runs where bends or long lengths are required. It has a black synthetic rubber tube and cover reinforced with a wire helix embedded between plies of heavy-duty synthetic cord, keeping the hose round and kink-resistant through tight routing. It is used for engine intake, bilge pump intake and discharge, scupper lines, wet exhaust connections, toilet intake and discharge, and holding tank vent or pump-out lines aboard boats. The hose resists exhaust fumes, ozone, mild chemicals, antifreeze, and saltwater, and its cover is abrasion and odor permeation resistant. It handles a continuous temperature range of -20 F to +200 F, with intermittent spikes to +250 F, and meets SAE J2006 Type R2 standards with double the ozone resistance the standard requires. Working pressure is rated at 75 PSI with a 220 PSI burst pressure, and the bend radius is 5 times the hose's inside diameter, letting it curve through tight engine compartments and bilges without collapsing. This line is available in inside diameters from 5\/8 inch up to 3 inches, in lengths from 6 1\/4 feet up to 25 feet on a carton reel for the 1 1\/4 inch size, so it covers everything from short exhaust jumpers to long intake or discharge runs.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 16-250\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Marine water\/exhaust hose\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Synthetic rubber tube and cover reinforced with wire helix between plies of HD synthetic cord\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e Black\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePly:\u003c\/strong\u003e 2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInside Diameter (ID) Options:\u003c\/strong\u003e 5\/8 inch, 3\/4 inch, 1 inch, 1 1\/4 inch, 2 inch, 3 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutside Diameter (OD) by Size:\u003c\/strong\u003e 5\/8 inch ID: 61\/64 inch OD; 3\/4 inch ID: 1 1\/16 inch OD; 1 inch ID: 1 5\/16 inch OD; 1 1\/4 inch ID: 1 19\/32 inch OD; 2 inch ID: 2 13\/32 inch OD; 3 inch ID: 3.44 inches OD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength Options:\u003c\/strong\u003e 6 1\/4 feet, 10 feet, 12 1\/2 feet, 25 feet (carton)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBend Radius:\u003c\/strong\u003e 5 x inside diameter\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBurst Pressure:\u003c\/strong\u003e 220 PSI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWorking Pressure:\u003c\/strong\u003e 75 PSI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature Range:\u003c\/strong\u003e -20 F to +200 F continuous, +250 F intermittent\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandards Compliance:\u003c\/strong\u003e Meets SAE J2006 Type R2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrimary Uses:\u003c\/strong\u003e Engine intake, bilge pump intake\/discharge, scupper lines, wet exhaust connections, toilet intake\/discharge, holding tank vent\/pump-out\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSizes \u0026amp; Options\u003c\/h3\u003e\u003cp\u003eChoose your inside diameter first to match the fitting, thru-hull, or exhaust outlet the hose connects to, then choose the length needed for the full run, adding extra where the hose will bend. The 1 1\/4 inch size is offered in both a 10 foot length and a 25 foot carton for longer runs; other sizes are offered in a single length as listed. Measure your existing hose or connection before ordering to confirm the correct inside diameter.\u003c\/p\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat sizes does the Sierra Shieldsflex II hose come in?\u003c\/strong\u003e The Shieldsflex II line spans inside diameters from 5\/8 inch up to 3 inches, so match it to the fitting or thru-hull it will connect to before ordering.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow do I know which length to order?\u003c\/strong\u003e Lengths run from 6 1\/4 feet up to 25 feet on a carton reel for the 1 1\/4 inch size. Measure the full run of the intake, exhaust, or discharge line and add extra where the hose will bend, since Shieldsflex II is designed for runs that require bends or long lengths.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is this hose used for?\u003c\/strong\u003e Sierra Shieldsflex II is used for engine intake, bilge pump intake and discharge, scupper lines, wet exhaust connections, toilet intake and discharge, and holding tank vent or pump-out lines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the hose reinforced or will it collapse on tight bends?\u003c\/strong\u003e A wire helix is embedded between plies of heavy-duty synthetic cord in Shieldsflex II, which keeps the hose round and kink-resistant even when routed through tight bends with a bend radius of 5 times its inside diameter.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat temperatures can it handle?\u003c\/strong\u003e 20 F to +200 F continuously, with intermittent spikes up to +250 F, which is the rated range for the Sierra Shieldsflex II hose.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat pressure is the hose rated for?\u003c\/strong\u003e 220 PSI burst pressure and 75 PSI working pressure are the ratings for this Shieldsflex II hose line.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the hose made of?\u003c\/strong\u003e A black synthetic rubber tube and cover, resistant to exhaust fumes, ozone, mild chemicals, antifreeze, and saltwater, makes up the Sierra Shieldsflex II hose.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes this hose meet any industry standards?\u003c\/strong\u003e Yes, Shieldsflex II meets SAE J2006 Type R2 standards, with double the ozone resistance that standard requires.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat's the difference between the 6 1\/4 foot and 10 foot options?\u003c\/strong\u003e They are the same hose construction cut to different lengths; choose the length based on the total run you need to cover, since Sierra offers Shieldsflex II in multiple lengths per size.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan this hose be used for exhaust runs with bends?\u003c\/strong\u003e Yes, Shieldsflex II is specifically built for wet exhaust connections where bends or long lengths are required, unlike a rigid exhaust hose.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 3 inch size available in a long length like the smaller sizes?\u003c\/strong\u003e The 3 inch Shieldsflex II hose is offered in a 6 1\/4 foot length.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color is the hose?\u003c\/strong\u003e Sierra Shieldsflex II hose has a black synthetic rubber tube and cover.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"3\/4\" \/ 6 1\/4'","offer_id":48988025749723,"sku":"SIE-16-250-0341","price":42.12,"currency_code":"USD","in_stock":true},{"title":"5\/8\" \/ 10'","offer_id":48988025782491,"sku":"SIE-16-250-0583","price":63.14,"currency_code":"USD","in_stock":true},{"title":"1\" \/ 6 1\/4'","offer_id":48988025815259,"sku":"SIE-16-250-1001","price":45.77,"currency_code":"USD","in_stock":true},{"title":"1 1\/4\" \/ 10'","offer_id":48988025848027,"sku":"SIE-16-250-1143","price":74.84,"currency_code":"USD","in_stock":true},{"title":"1 1\/4\" \/ 25' Carton","offer_id":48988025880795,"sku":"SIE-16-250-1145","price":181.21,"currency_code":"USD","in_stock":true},{"title":"2\" \/ 12 1\/2'","offer_id":48988025913563,"sku":"SIE-16-250-2004","price":131.3,"currency_code":"USD","in_stock":true},{"title":"3\" \/ 6 1\/4'","offer_id":48988025946331,"sku":"SIE-116-250-3001","price":111.92,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/ShieldsFlex__82759.1784651535.500.750.jpg?v=1785188900"},{"product_id":"sierra-18-2849-exhaust-elbow-gasket-for-mercruiser-center-rise-manifolds-available-single-or-pack-of-2","title":"Sierra Exhaust Elbow Gasket 18-2849 for Mercruiser Exhaust Manifolds - Available Single or Pack of 2","description":"\u003cp\u003eThe Sierra 18-2849 Exhaust Elbow Gasket is an open-style gasket that seals the connection between the exhaust manifold and the exhaust manifold elbow on applicable Mercruiser stern drive installations. It is designed to fit the 18-1957-2 exhaust manifold (used on GM Big Block V8 454 cu. In. Applications, Models 330, 340 \u0026amp; 7.4L) and mates with the 18-1970-2 (3 inch hose), 18-1976-2 (4 inch hose, 7 degree down angle), and 18-1974-1 (3 inch hose, 15 degree down angle) manifold elbows. The gasket is constructed from a stainless steel infused graphite material engineered for superior compressibility, giving it a reliable seal against exhaust gas and cooling water leakage at the manifold-to-elbow joint. Its round, open-flow design matches the factory port profile so exhaust and water flow are not restricted.\u003c\/p\u003e\u003cp\u003eThis gasket is a routine maintenance and repair item, typically replaced any time the exhaust elbow is removed for service, inspection, or corrosion, or as part of a preventive maintenance schedule to avoid gasket failure and coolant intrusion. It is available as a single gasket or in a package of 2, so owners replacing elbows on both sides of the engine, or keeping a spare on hand, can order the quantity that matches the job.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-2849\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Exhaust Elbow Gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDesign:\u003c\/strong\u003e Open\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e 27-818832\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits Manifold:\u003c\/strong\u003e 18-1957-2 (GM Big Block V8 454 cu. In., Models 330, 340 \u0026amp; 7.4L)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits Elbows:\u003c\/strong\u003e 18-1970-2 (3 inch hose), 18-1976-2 (4 inch hose, 7 degree down angle), 18-1974-1 (3 inch hose, 15 degree down angle)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Stainless steel infused graphite\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e Black\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShape:\u003c\/strong\u003e Round\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackaging Options:\u003c\/strong\u003e Single or pack of 2\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSizes \u0026amp; Options\u003c\/h3\u003e\u003cp\u003eThis gasket is sold two ways: as a single gasket, or as a package of 2. Choose the single option if you are replacing one elbow gasket, or the pack of 2 if you are servicing elbows on both sides of the engine or want a spare on hand. Both options are the identical open-style gasket fitting the 18-1957-2 manifold and its matching 18-1970-2, 18-1976-2, and 18-1974-1 elbows; only the quantity in the package differs.\u003c\/p\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-2849 exhaust elbow gasket fit?\u003c\/strong\u003e The 18-2849 gasket fits the 18-1957-2 exhaust manifold and seals it to the 18-1970-2, 18-1976-2, or 18-1974-1 manifold elbows.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this gasket sold as a single piece or in a pack?\u003c\/strong\u003e The Sierra 18-2849 gasket is available either as a single gasket or as a package of 2, so you can order the exact quantity needed for a one-side or two-side elbow replacement.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the OEM cross reference number for this gasket?\u003c\/strong\u003e The 18-2849 gasket cross references to Mercruiser\/Mercury number 27-818832.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is the exhaust elbow gasket made from?\u003c\/strong\u003e It is made from a stainless steel infused graphite material, chosen for its compressibility and ability to hold a reliable seal at the exhaust elbow joint.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this an open or blocked style gasket?\u003c\/strong\u003e This is the open-style elbow gasket (18-2849), which matches manifolds using the open exhaust port configuration, as opposed to a blocked-style gasket.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich manifold elbows use this gasket?\u003c\/strong\u003e The 18-2849 gasket is used with the 18-1970-2 elbow (3 inch hose), the 18-1976-2 elbow (4 inch hose, 7 degree down angle), and the 18-1974-1 elbow (3 inch hose, 15 degree down angle).\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow do I know if I need the single gasket or the pack of 2?\u003c\/strong\u003e If you are only replacing one exhaust elbow, order the single 18-2849 gasket; if you are servicing elbows on both sides of the engine or want a spare in reserve, order the pack of 2.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color is the gasket and what shape is it?\u003c\/strong\u003e The Sierra exhaust elbow gasket is black and round in shape, matching the factory open exhaust port profile.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes this gasket work with the 18-1957-2 manifold?\u003c\/strong\u003e Yes, the 18-2849 gasket is designed to fit the 18-1957-2 exhaust manifold, which is used on GM Big Block V8 454 cu. In. Applications, Models 330, 340 and 7.4L.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDo I need any other gaskets or hardware with this part?\u003c\/strong\u003e The 18-2849 elbow gasket seals the manifold-to-elbow joint only; the corresponding manifold gasket and mounting hardware for the 18-1957-2 manifold are separate parts.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-2849 gasket genuine Sierra or aftermarket?\u003c\/strong\u003e It is a Sierra-branded exhaust elbow gasket, sold under Sierra part number 18-2849, and is backed by Sierra.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Single","offer_id":48988029059291,"sku":"SIE-18-2849-1","price":10.8,"currency_code":"USD","in_stock":false},{"title":"Pack of 2","offer_id":48988029092059,"sku":"SIE-18-2849-9-1","price":21.57,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/18-2849-1__33114.1722491711.500.750.jpg?v=1785188455"},{"product_id":"sierra-exhaust-hose-t-bolt-band-clamp-available-in-2-to-6-id-series-200-250","title":"Sierra T-Bolt Band Clamp for Marine Exhaust Hose - Available in 2\" and 6\" ID","description":"\u003cp\u003eThis Sierra T-Bolt Band Clamp is a heavy-duty stainless steel clamp built to secure marine exhaust hose in below-the-waterline applications. It is designed to fit Shields Series 200 and 250 exhaust hose, with the larger size also suited to Series 202 silicone hose. The band is 316 stainless steel,.025 inch thick and.75 inch wide, chosen for its resistance to corrosion in wet, salt-exposed engine and exhaust environments. The bolt, nut, and trunion are 18-8 (304) stainless steel, and each clamp includes an extra-long 1\/4 inch bolt paired with a nylon insert locknut to resist vibration loosening over time. Each clamp carries a maximum torque rating of 75 inch-pounds, which should not be exceeded during installation to avoid damaging the hose or band.\u003c\/p\u003e\u003cp\u003eThis T-Bolt clamp line is sold as a single product family covering two inside-diameter sizes so boat owners can match the clamp to their exhaust hose without hunting through separate listings. Use it anywhere a standard worm-gear clamp is not robust enough, such as securing large-diameter exhaust hose to risers, mufflers, or through-hull fittings below the waterline.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-720\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e 316 stainless steel band; 18-8 (304) stainless steel bolt, nut, and trunion\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBand Thickness:\u003c\/strong\u003e 0.025 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBand Width:\u003c\/strong\u003e 0.75 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBolt:\u003c\/strong\u003e Extra-long 1\/4 inch bolt with nylon insert locknut\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Torque:\u003c\/strong\u003e 75 inch-pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment:\u003c\/strong\u003e Shields Series 200 and 250 hose (Series 202 silicone hose for the 6 inch size)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Below-the-waterline marine exhaust hose connections\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAvailable Sizes:\u003c\/strong\u003e 2 inch ID, 6 inch ID\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSizes \u0026amp; Options\u003c\/h3\u003e\u003cp\u003eChoose the clamp by the inside diameter (ID) of the exhaust hose it will secure. The 2 inch clamp fits a diameter range of 2.27-2.67 inches and is intended for 2 inch ID hose. The 6 inch clamp fits a diameter range of 6.38-7.04 inches and is intended for 6 inch ID hose. Measure the outside diameter of the hose at the clamping point and select the size whose range matches your measurement.\u003c\/p\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat sizes does the Sierra T-Bolt Band Clamp come in?\u003c\/strong\u003e This clamp line comes in two sizes: a 2 inch ID clamp (Sierra 18-720-2000) that fits a diameter range of 2.27-2.67 inches, and a 6 inch ID clamp (Sierra 18-720-6000) that fits a diameter range of 6.38-7.04 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat hose does this clamp fit?\u003c\/strong\u003e The Sierra 18-720 T-Bolt Band Clamp is designed to fit Shields Series 200 and 250 exhaust hose, and the 6 inch size additionally fits Series 202 silicone hose.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this clamp safe to use below the waterline?\u003c\/strong\u003e Yes, the Sierra 18-720 T-Bolt Band Clamp is specifically designed for below-the-waterline exhaust hose applications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the band made of?\u003c\/strong\u003e The band on this Sierra T-Bolt clamp is 316 stainless steel, 0.025 inch thick and 0.75 inch wide, chosen for corrosion resistance in wet marine environments.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat hardware comes with the clamp?\u003c\/strong\u003e Each Sierra 18-720 clamp includes an extra-long 1\/4 inch bolt and a nylon insert locknut, with the bolt, nut, and trunion made of 18-8 (304) stainless steel.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much torque should I apply when tightening this clamp?\u003c\/strong\u003e The maximum torque rating for the Sierra 18-720 T-Bolt Band Clamp is 75 inch-pounds; exceeding this can damage the hose or band.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow do I know which size clamp to order?\u003c\/strong\u003e Measure the outside diameter of the exhaust hose at the clamping point: choose the 2 inch clamp (18-720-2000) for a 2.27-2.67 inch diameter, or the 6 inch clamp (18-720-6000) for a 6.38-7.04 inch diameter.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this a genuine Sierra part?\u003c\/strong\u003e Yes, both the 18-720-2000 and 18-720-6000 clamps are genuine Sierra parts.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the difference between the two clamp sizes besides diameter?\u003c\/strong\u003e Beyond the ID and clamping diameter range, the two sizes in the 18-720 line differ in overall band dimension (\"C\" measurement), which is larger on the 6 inch clamp (18-720-6000) than on the 2 inch clamp (18-720-2000) to match the larger hose.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan this clamp be used for anything other than exhaust hose?\u003c\/strong\u003e The Sierra 18-720 T-Bolt Band Clamp is designed as an exhaust hose clamp for below-the-waterline applications, matched to Shields Series 200, 250, and (on the 6 inch size) 202 hose.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"2\" ID","offer_id":48988031189211,"sku":"SIE-18-720-2000","price":9.82,"currency_code":"USD","in_stock":true},{"title":"6\" ID","offer_id":48988031221979,"sku":"SIE-118-720-6000","price":13.28,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/sierra_lg_949__26559__74879.1772547083.500.750.jpg?v=1785189133"},{"product_id":"sierra-18-0183-1-exhaust-manifold-gasket-for-crusader-marine-engines-riser-18-1938-manifold-oem-98243","title":"Sierra Manifold Gasket 18-0183-1, Replaces 27-73866, for Exhaust Manifolds 18-1958-1 \u0026 18-1962-1","description":"\u003cp\u003eThe Sierra 18-0183-1 is a manifold gasket engineered to seal the connection between the exhaust manifold and the engine block on applicable inboard and sterndrive setups. It is designed for use with Sierra exhaust manifolds 18-1958-1 and 18-1962-1, and it is also included as a component in the Sierra 18-8509 mounting kit for buyers who need the full mounting hardware set rather than the gasket alone. A proper manifold gasket is a critical wear item: it maintains the seal against combustion gases, exhaust backpressure, and cooling water routed through the manifold passages, and a worn or failed gasket is a common cause of exhaust leaks, water intrusion, or gasket-related corrosion around the manifold mounting surface. Replacing this gasket whenever the manifold is removed, serviced, or reinstalled helps ensure a proper seal and prevents having to redo the job due to a compromised old gasket. This part cross-references directly to OEM number 27-73866, so it is a straightforward drop-in replacement for that OEM gasket. At 0.2 pounds, it ships and installs easily alongside routine manifold maintenance or a full manifold replacement.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-0183-1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Manifold Gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.2 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUsed With:\u003c\/strong\u003e Manifolds 18-1958-1, 18-1962-1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAlso Included In:\u003c\/strong\u003e 18-8509 mounting kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross-Reference:\u003c\/strong\u003e 27-73866\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eUse with exhaust manifold 18-1958-1\u003c\/li\u003e\n\u003cli\u003eUse with exhaust manifold 18-1962-1\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e27-73866\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-0183-1 gasket fit?\u003c\/strong\u003e The 18-0183-1 manifold gasket is designed for use with exhaust manifolds 18-1958-1 and 18-1962-1.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs 18-0183-1 the same as OEM part 27-73866?\u003c\/strong\u003e Yes, the Sierra 18-0183-1 gasket cross-references directly to OEM number 27-73866, making it a direct replacement for that part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does this gasket weigh?\u003c\/strong\u003e The 18-0183-1 manifold gasket weighs 0.2 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes this gasket come with the mounting kit?\u003c\/strong\u003e It is included as a component of the 18-8509 mounting kit, and it is also sold separately as the standalone 18-0183-1 gasket for buyers who only need the gasket.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill I need more than one gasket for a manifold job?\u003c\/strong\u003e That depends on your manifold configuration; check whether your installation uses one or two manifolds, since each 18-1958-1 or 18-1962-1 manifold requires its own 18-0183-1 gasket.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I reuse my old manifold gasket instead of replacing it?\u003c\/strong\u003e Manifold gaskets like the 18-0183-1 are designed as one-time-use sealing components, and reusing a compressed or damaged gasket increases the risk of exhaust or water leaks at the manifold joint.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included in the 18-8509 mounting kit?\u003c\/strong\u003e The 18-8509 mounting kit includes the 18-0183-1 manifold gasket along with mounting bolts for installing the manifold.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-0183-1 gasket for the manifold-to-block connection?\u003c\/strong\u003e Yes, this gasket seals the exhaust manifold at its mounting point for manifolds 18-1958-1 and 18-1962-1.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM number should I search for if I only have the old part in hand?\u003c\/strong\u003e Look for OEM number 27-73866; the Sierra 18-0183-1 gasket is the direct replacement for that number.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDo I need special tools to install this gasket?\u003c\/strong\u003e Installation follows standard manifold gasket procedure: remove the old gasket, clean the mating surfaces, and torque the manifold bolts to the engine manufacturer's specification with the new 18-0183-1 gasket in place.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988031320283,"sku":"SIE-18-0183-1","price":13.81,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-0183_lg__27751.1558118728.500.750.jpg?v=1785329169"},{"product_id":"exhaust-elbow-gasket-18-0305-1-oem-96108-for-crusader-7-4l-454-gm-big-block-v8-manifolds-18-1929-18-1933","title":"Sierra Exhaust Manifold Elbow Gasket 18-0305-1, Replaces 96108, for Crusader 18-1929\/18-1933 Manifolds","description":"\u003cp\u003eThis Sierra Exhaust Manifold Elbow Gasket, part number 18-0305-1, is the gasket that seals the connection between the exhaust manifold and the exhaust elbow on compatible Crusader marine engine setups. It is designed for use with Crusader exhaust manifolds 18-1929 (Starboard) and 18-1933 (Port), forming the seal that keeps exhaust gases and cooling water properly contained at the manifold-to-elbow joint. This gasket is also included as a component of the 18-8515 mounting kit, so buyers assembling or servicing that kit already have this gasket on hand and do not need to order it separately unless replacing a worn unit individually.\u003c\/p\u003e\u003cp\u003eKeeping this gasket in good condition is important for preventing exhaust leaks and water intrusion at the manifold connection, both of which can lead to reduced engine performance, corrosion, or more serious cooling system issues if left unaddressed. At just 0.02 pounds, it is a lightweight, low-cost component that is inexpensive insurance against a failed seal during routine exhaust system maintenance or manifold replacement.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-0305-1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Name:\u003c\/strong\u003e Exhaust Elbow Gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282365738\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.02 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Crusader Exhaust Manifolds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCross Reference \/ OEM Number:\u003c\/strong\u003e 96108\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eUsed with Crusader Exhaust Manifold 18-1929 (Starboard)\u003c\/li\u003e\n\u003cli\u003eUsed with Crusader Exhaust Manifold 18-1933 (Port)\u003c\/li\u003e\n\u003cli\u003eIncluded in Mounting Kit 18-8515\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e96108\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is Sierra part 18-0305-1 used for?\u003c\/strong\u003e It is the elbow gasket that seals the joint between the exhaust manifold and the exhaust elbow, used with Crusader exhaust manifolds 18-1929 and 18-1933.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes this gasket fit both the port and starboard manifolds?\u003c\/strong\u003e Yes, gasket 18-0305-1 is used with both the starboard manifold 18-1929 and the port manifold 18-1933.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs 18-0305-1 the same gasket included in the 18-8515 mounting kit?\u003c\/strong\u003e Yes, this exact gasket, 18-0305-1, is included as a component of the 18-8515 mounting kit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM number does this gasket cross-reference to?\u003c\/strong\u003e Sierra 18-0305-1 corresponds to OEM number 96108.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does this gasket weigh?\u003c\/strong\u003e The 18-0305-1 exhaust elbow gasket weighs 0.02 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is the 18-0305-1 gasket made of?\u003c\/strong\u003e The dossier does not specify the gasket material for 18-0305-1.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDo I need a different gasket for the elbow with the 4 inch outlet?\u003c\/strong\u003e Yes, the elbow with a 4 inch outlet (18-1928) uses a different gasket, 18-0309-1, not 18-0305-1.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I buy this gasket separately if I already have the 18-8515 kit?\u003c\/strong\u003e You can order 18-0305-1 individually as a replacement gasket even though it is also included in the 18-8515 mounting kit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich manifolds require this specific gasket?\u003c\/strong\u003e Manifolds 18-1929 (starboard) and 18-1933 (port) both use gasket 18-0305-1 at the elbow connection.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this a genuine Sierra part or aftermarket?\u003c\/strong\u003e 18-0305-1 is a Sierra-branded exhaust elbow gasket, not an unbranded aftermarket substitute.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included when I order this gasket?\u003c\/strong\u003e Ordering 18-0305-1 provides the single exhaust elbow gasket component only.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988061466843,"sku":"SIE-18-0305-1","price":9.56,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-0305_lg__58964.1558119547.500.750.jpg?v=1785329158"},{"product_id":"sierra-18-0309-1-exhaust-elbow-gasket-oem-96562-for-crusader-603-inboard-exhaust-elbows-18-1928-18-1934-18-1918","title":"Sierra Exhaust Elbow Gasket 18-0309-1, Replaces OE 96562, Fits Exhaust Elbows 18-1928, 18-1934 \u0026 18-1918","description":"\u003cp\u003eThe Sierra 18-0309-1 is an exhaust elbow gasket designed for marine inboard cooling and exhaust systems, sealing the connection at the exhaust elbow to prevent exhaust and water leaks. It is used with Exhaust Elbows 18-1928, 18-1934, and 18-1918, and is also referenced as the elbow gasket for the Sierra 18-1927 4 inch riser and 18-1916 8 inch riser assemblies, which are in turn used with manifolds 18-1933 and 18-1929. This gasket directly replaces OE number 96562, making it a straightforward drop-in for boat owners servicing their exhaust elbow or riser connections.\u003c\/p\u003e\u003cp\u003eA proper gasket seal at this joint is important for preventing raw water or exhaust leaks into the bilge or engine compartment, so replacing a worn or compressed gasket whenever the elbow or riser is removed for service or replacement is standard practice. The gasket is compact, measuring 0.39 x 0.39 x 0.39 inches, and weighs 0.03 pounds.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-0309-1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Exhaust Elbow Gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 0.39 x 0.39 x 0.39 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.03 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e 96562\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eUse with Exhaust Elbows: 18-1928, 18-1934, 18-1918\u003c\/li\u003e\n\u003cli\u003eAlso used as the elbow gasket with Riser 18-1927 (4 inch) and Riser 18-1916 (8 inch)\u003c\/li\u003e\n\u003cli\u003eRisers 18-1927 and 18-1916 are used with Manifolds 18-1933 and 18-1929\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e96562\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat exhaust elbows fit the Sierra 18-0309-1 gasket?\u003c\/strong\u003e The 18-0309-1 gasket is used with Exhaust Elbows 18-1928, 18-1934, and 18-1918.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes 18-0309-1 replace OEM part number 96562?\u003c\/strong\u003e Yes, Sierra 18-0309-1 is a direct replacement for OEM number 96562.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of this gasket?\u003c\/strong\u003e The 18-0309-1 exhaust elbow gasket measures 0.39 x 0.39 x 0.39 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-0309-1 gasket weigh?\u003c\/strong\u003e It weighs 0.03 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan this gasket be used with an exhaust riser instead of an elbow?\u003c\/strong\u003e Yes, the 18-0309-1 gasket is also specified for use with the Sierra 18-1927 4 inch riser and the 18-1916 8 inch riser.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat manifolds are compatible with the risers that use this gasket?\u003c\/strong\u003e The 18-1927 and 18-1916 risers, which use the 18-0309-1 gasket, are designed for use with Manifolds 18-1933 and 18-1929.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-0309-1 a genuine Sierra part?\u003c\/strong\u003e Yes, 18-0309-1 is manufactured and sold under the Sierra brand as a replacement exhaust elbow gasket.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included when ordering 18-0309-1?\u003c\/strong\u003e Ordering 18-0309-1 includes one exhaust elbow gasket.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen should the exhaust elbow gasket be replaced?\u003c\/strong\u003e The 18-0309-1 gasket should be replaced any time the exhaust elbow or riser it seals is removed, since a compressed or worn gasket at this joint can lead to exhaust or water leaks.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill 18-0309-1 fit manifolds 18-1933 or 18-1929 directly?\u003c\/strong\u003e The 18-0309-1 gasket is not listed as a direct manifold gasket; it is used with the exhaust elbows and risers that connect to Manifolds 18-1933 and 18-1929.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988062646491,"sku":"SIE-18-0309-1","price":9.24,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-0309_lg__64647.1558119785.500.750.jpg?v=1785188817"},{"product_id":"sierra-18-0418-exhaust-manifold-mounting-gasket-replaces-mercruiser-27-46820-gm-3852472-fits-454-cu-in-gm-big-block-v8","title":"Sierra 18-0418 Exhaust Manifold Mounting Gasket, Replaces Crusader 96653, for Manifold 18-1898","description":"\u003cp\u003eThe Sierra 18-0418 is an exhaust manifold mounting gasket engineered to seal the connection between the exhaust manifold and engine block on applicable inboard\/sterndrive setups. It is built to meet or exceed the quality of the original equipment part it replaces, giving installers a reliable seal that resists the heat and combustion byproducts present at the manifold mounting joint. This gasket is designed for use with Manifold 18-1898, so it is a direct fit when servicing or replacing that manifold assembly.\u003c\/p\u003e\u003cp\u003eAs a mounting gasket, its job is straightforward but critical: maintain a tight, leak-free seal at a high-heat, high-vibration joint so exhaust gases and cooling water stay contained within the manifold system. Sierra manufactures this part to original-equipment specifications, making it a straightforward drop-in replacement for the OEM gasket it supersedes. At 0.23 pounds, it ships as a single-count gasket ready to install during routine manifold service, gasket replacement, or a full exhaust system rebuild.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-0418\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Name:\u003c\/strong\u003e Exhaust Manifold Mounting Gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.23 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e white\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit Count:\u003c\/strong\u003e 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282257361\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUse With Manifold:\u003c\/strong\u003e 18-1898\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eUse with Manifold: 18-1898\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eCrusader 96653\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is the Sierra 18-0418 used for?\u003c\/strong\u003e The Sierra 18-0418 is an exhaust manifold mounting gasket that seals the joint where the exhaust manifold mounts, and it is designed for use with Manifold 18-1898.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-0418 gasket fit manifold 18-1898?\u003c\/strong\u003e Yes, the Sierra 18-0418 mounting gasket is specified for use with Manifold 18-1898.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part number does the Sierra 18-0418 replace?\u003c\/strong\u003e It replaces Crusader part number 96653.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-0418 gasket weigh?\u003c\/strong\u003e 0.23 pounds, per unit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color is the Sierra 18-0418 gasket?\u003c\/strong\u003e White is the color of this gasket as supplied by Sierra.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many gaskets come in one Sierra 18-0418 package?\u003c\/strong\u003e One gasket is included per unit count of the Sierra 18-0418 package.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-0418 an OEM or aftermarket gasket?\u003c\/strong\u003e It is an aftermarket gasket manufactured by Sierra to meet or exceed the quality of the original equipment part it replaces, specifically Crusader 96653.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-0418?\u003c\/strong\u003e The UPC is 808282257361.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan the Sierra 18-0418 be used as a direct replacement without modification?\u003c\/strong\u003e Yes, since it is manufactured to meet or exceed original equipment specifications for the Crusader 96653 gasket it replaces, it installs as a direct replacement with Manifold 18-1898.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-0418 gasket sold individually?\u003c\/strong\u003e Yes, it is sold as a single gasket, with a unit count of one.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988074148059,"sku":"SIE-18-0418","price":16.94,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-0418_lg__74798.1558118370.500.750.jpg?v=1785188088"},{"product_id":"sierra-18-0475-1-exhaust-elbow-gasket-open-oem-98127-for-crusader-inboard-manifold-riser-systems","title":"Sierra Exhaust Elbow Gasket 18-0475-1, Replaces 98127, Open Style for Crusader Exhaust Riser 18-1938","description":"\u003cp\u003eThe Sierra Exhaust Elbow Gasket 18-0475-1 is an open-style gasket designed for use with a universal exhaust elbow in Crusader inboard exhaust manifold cooling systems. It is engineered to work with Sierra Riser 18-1938, forming a reliable seal at the riser-to-elbow connection where exhaust heat and cooling water both pass through the joint. As an open gasket, it is cut to allow full flow through the elbow passage rather than restricting it, matching the design of the universal elbow it is paired with.\u003c\/p\u003e\u003cp\u003eThis gasket is also used as part of the Sierra Mounting Kit 18-8547, which is built for use with Riser 18-1938 and includes the 18-0475-1 gasket as a component. Keeping a properly fitted gasket at this joint helps maintain a tight seal in the exhaust cooling system and supports consistent performance of the riser and elbow assembly during service or replacement.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-0475-1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Exhaust Elbow Gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStyle:\u003c\/strong\u003e Open (universal elbow)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUsed With:\u003c\/strong\u003e Riser 18-1938\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAlso Included In:\u003c\/strong\u003e Mounting Kit 18-8547\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e 98127\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282365806\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.1 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Crusader exhaust manifold cooling system\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eUsed with Crusader inboard exhaust manifold cooling systems, specifically with Riser 18-1938 and Mounting Kit 18-8547.\u003c\/p\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e98127\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is the Sierra 18-0475-1 gasket used for?\u003c\/strong\u003e The Sierra 18-0475-1 is an open-style exhaust elbow gasket used in Crusader inboard exhaust manifold cooling systems, sealing the joint where the exhaust elbow meets the riser.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM number does the 18-0475-1 gasket replace?\u003c\/strong\u003e The 18-0475-1 gasket cross-references to OEM number 98127.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-0475-1 gasket weigh?\u003c\/strong\u003e The Sierra 18-0475-1 exhaust elbow gasket weighs 0.1 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat riser does the 18-0475-1 gasket fit?\u003c\/strong\u003e This gasket, part number 18-0475-1, is designed for use with Sierra Riser 18-1938.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-0475-1 gasket included in any kits?\u003c\/strong\u003e Yes, the 18-0475-1 gasket is included as a component in Sierra Mounting Kit 18-8547, which is used with Riser 18-1938.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does open style mean for this elbow gasket?\u003c\/strong\u003e An open gasket, like the 18-0475-1, is cut to allow full flow through the exhaust elbow passage rather than restricting it, matching the universal elbow design it pairs with.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-0475-1 gasket?\u003c\/strong\u003e The UPC for the Sierra 18-0475-1 exhaust elbow gasket is 808282365806.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-0475-1 gasket come with mounting bolts?\u003c\/strong\u003e The gasket itself, part number 18-0475-1, does not include mounting bolts; those are supplied separately in the Mounting Kit 18-8547.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat system is the 18-0475-1 gasket part of?\u003c\/strong\u003e 18-0475-1 is used in the Crusader exhaust manifold cooling system, specifically at the elbow-to-riser connection.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan the 18-0475-1 gasket be used with any elbow?\u003c\/strong\u003e The 18-0475-1 is an open gasket designed for a universal exhaust elbow and is intended for use with Riser 18-1938.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988075032795,"sku":"SIE-18-0475-1","price":11.67,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-0475_lg__15649.1558120771.500.750.jpg?v=1785188921"},{"product_id":"riser-gasket-18-0476-1-for-blocked-locked-center-riser-exhaust-manifold-crusader-interceptor-mercury-omc","title":"Sierra Elbow Gasket 18-0476-1 (Blocked) for Volvo Penta Exhaust Risers 18-1939, 18-1999","description":"\u003cp\u003eThe Sierra 18-0476-1 is a blocked-style elbow gasket designed for closed cooling system exhaust riser installations. It seals the connection between the manifold elbow riser and the exhaust system, and is built to the exact fit required for the 18-1939 and 18-1999 manifold elbow risers. This gasket is also included as a component of the Sierra 18-8535 mounting kit, which is the blocked-gasket mounting package used with these risers.\u003c\/p\u003e\u003cp\u003eBecause it is the blocked-style gasket, the 18-0476-1 is intended for closed cooling system exhaust setups rather than open-style configurations. Buyers replacing a worn or leaking riser gasket, or assembling a complete blocked mounting kit, can use this part on its own or alongside the 18-8535 kit components. A direct OEM cross-reference to Barr Marine part 01-0105 is available for buyers matching this gasket against an existing part number.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-0476-1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Elbow Gasket (Blocked)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCooling System Application:\u003c\/strong\u003e Closed cooling system\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Risers:\u003c\/strong\u003e 18-1939, 18-1999\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded In Mounting Kit:\u003c\/strong\u003e 18-8535\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e Barr Marine 01-0105\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.05 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282363635\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eUsed with 3 1\/2 inch manifold elbow riser 18-1939\u003c\/li\u003e\n\u003cli\u003eUsed with 3 1\/2 inch manifold elbow riser 18-1999\u003c\/li\u003e\n\u003cli\u003eIncluded in the 18-8535 blocked mounting kit\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eBarr Marine 01-0105\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is the Sierra 18-0476-1 gasket used for?\u003c\/strong\u003e It is a blocked-style elbow gasket that seals the connection between a manifold elbow riser and the exhaust system on a closed cooling system setup.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich risers does the 18-0476-1 gasket fit?\u003c\/strong\u003e The 18-0476-1 is used with the 18-1939 and 18-1999 manifold elbow risers.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-0476-1 a blocked or open style gasket?\u003c\/strong\u003e It is the blocked-style elbow gasket, intended for closed cooling system exhaust riser installations rather than open-style setups.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-0476-1 gasket come as part of a mounting kit?\u003c\/strong\u003e Yes, the 18-0476-1 elbow gasket is included in the Sierra 18-8535 blocked mounting kit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs there an OEM equivalent number for the 18-0476-1 gasket?\u003c\/strong\u003e Barr Marine 01-0105 is the OEM cross-reference number for the Sierra 18-0476-1 elbow gasket.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the difference between the 18-0476-1 and 18-2854-1 gaskets?\u003c\/strong\u003e The 18-0476-1 is the blocked-style gasket for closed cooling systems, while the 18-2854-1 is the corresponding 3 inch open-style gasket included in the 18-4364 mounting kit; both are used with the same 18-1939 and 18-1999 risers but are not interchangeable with each other.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-0476-1 elbow gasket weigh?\u003c\/strong\u003e The Sierra 18-0476-1 elbow gasket weighs 0.05 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan the 18-0476-1 gasket be used with the 18-4364 mounting kit?\u003c\/strong\u003e No, the 18-0476-1 is the blocked-style gasket used with the 18-8535 mounting kit; the 18-4364 kit uses the open-style 18-2854-1 gasket instead.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-0476-1 gasket suitable for Volvo Penta exhaust manifold systems?\u003c\/strong\u003e Yes, the Sierra 18-0476-1 blocked elbow gasket is used in Volvo Penta exhaust manifold riser applications with the 18-1939 and 18-1999 risers.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat cooling system setup requires the 18-0476-1 blocked gasket?\u003c\/strong\u003e A closed cooling system requires the blocked-style gasket design used by the Sierra 18-0476-1.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988075131099,"sku":"SIE-18-0476-1","price":8.44,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-0476_lg__21620.1659362476.500.750.jpg?v=1785329157"},{"product_id":"sierra-18-0540-exhaust-leg-rubber-seal-replaces-omc-320936-omc-cobra-sterndrive","title":"Sierra Exhaust Leg Rubber Seal 18-0540, Replaces OMC 320936, for OMC Cobra Sterndrive","description":"\u003cp\u003eThe Sierra 18-0540 Exhaust Leg Rubber Seal is a rubber sealing component designed for OMC Cobra sterndrive applications. It seals the exhaust leg to prevent water intrusion and exhaust leakage at the joint, helping protect surrounding components from corrosion and heat damage caused by a failed seal. The seal is molded from rubber in a round shape and finished in white.\u003c\/p\u003e\u003cp\u003eSierra manufactures this seal to meet or exceed the quality of the original equipment part it replaces, making it a reliable choice when servicing the exhaust leg on compatible OMC Cobra sterndrive units. Replacing a worn or cracked exhaust leg seal at the first sign of deterioration helps avoid water entering the exhaust system and prevents more costly repairs down the line. Each unit is sold individually and is straightforward to install as part of a routine exhaust leg service.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-0540\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Name:\u003c\/strong\u003e Exhaust Leg Rubber Seal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Rubber\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e White\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShape:\u003c\/strong\u003e Round\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.05 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999874481\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eOMC Cobra sterndrive applications\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e320936\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is the Sierra 18-0540 used for?\u003c\/strong\u003e The Sierra 18-0540 is a rubber seal that fits on the exhaust leg of an OMC Cobra sterndrive, sealing the joint to prevent water and exhaust leakage.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-0540 seal replace OEM part 320936?\u003c\/strong\u003e Yes, the Sierra 18-0540 Exhaust Leg Rubber Seal replaces OEM part number 320936 and is built to meet or exceed the quality of the original part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is the 18-0540 exhaust leg seal made from?\u003c\/strong\u003e It is made from rubber, molded in a round shape, and finished in white.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-0540 seal weigh?\u003c\/strong\u003e The Sierra 18-0540 Exhaust Leg Rubber Seal weighs 0.05 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color is the Sierra 18-0540 seal?\u003c\/strong\u003e This exhaust leg seal is white.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-0540 an OEM or aftermarket part?\u003c\/strong\u003e The 18-0540 is a Sierra aftermarket replacement seal manufactured to meet or exceed the specifications of the original equipment part it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many seals come in a package of the 18-0540?\u003c\/strong\u003e The 18-0540 Exhaust Leg Rubber Seal is sold as a single unit count of one.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat boats or engines use the 18-0540 exhaust leg seal?\u003c\/strong\u003e The 18-0540 is designed for OMC Cobra sterndrive applications where an exhaust leg rubber seal is required.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow do I know if my exhaust leg seal needs replacement?\u003c\/strong\u003e If the exhaust leg rubber seal on an OMC Cobra sterndrive is cracked, hardened, or leaking, it should be replaced with a seal such as the Sierra 18-0540 to prevent water intrusion into the exhaust system.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-0540 seal?\u003c\/strong\u003e The UPC for the Sierra 18-0540 Exhaust Leg Rubber Seal is 030999874481.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988077162715,"sku":"SIE-18-0540","price":13.62,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-0540_lg__57578.1558119494.500.750.jpg?v=1785188611"},{"product_id":"exhaust-manifold-gasket-set-for-ford-302-351-cid-marine-engines-replaces-glm-39920-sierra-18-0603","title":"Sierra 18-0603 Exhaust Manifold Gasket Set, Ford 302-351 CID Engines, Replaces GLM 39920","description":"\u003cp\u003eThe Sierra 18-0603 Exhaust Manifold Gasket Set supplies the gaskets needed to properly seal the exhaust manifold on Ford 302-351 CID marine engines when installing or servicing a Sierra 18-1998-1 exhaust manifold. The set includes two exhaust manifold gaskets (18-0183-1) plus exhaust elbow gaskets, giving you a complete matched pair for a two-side installation rather than having to source individual gaskets separately. Each gasket is built to seal reliably against the heat and vibration of marine exhaust manifold service, helping prevent exhaust leaks and coolant seepage at the manifold joint on a closed cooling system setup. Sierra states that this gasket set is manufactured to meet or exceed the specifications of the original equipment part it replaces, making it a straightforward equivalent when the OEM gasket is worn, hardened, or no longer sealing correctly. The set is packaged as a single kit under Sierra part number 18-0603, so installers get all the gaskets required for the job in one purchase instead of ordering each gasket individually. It is intended for use specifically with the Sierra 18-1998-1 exhaust manifold on Ford 302-351 CID engines, and is a direct cross-reference for the GLM 39920 gasket set.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-0603\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Name:\u003c\/strong\u003e Exhaust Manifold Gasket Set\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits:\u003c\/strong\u003e Ford 302-351 CID Engines\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUse With Manifold:\u003c\/strong\u003e 18-1998-1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncludes:\u003c\/strong\u003e Exhaust manifold gaskets (18-0183-1) and exhaust elbow gaskets\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e White\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.33 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit Count:\u003c\/strong\u003e 1 set\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eFord 302-351 CID Engines\u003c\/li\u003e\n\u003cli\u003eUse with Sierra 18-1998-1 exhaust manifold\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eGLM 39920\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-0603 gasket set fit?\u003c\/strong\u003e The Sierra 18-0603 Exhaust Manifold Gasket Set is designed for Ford 302-351 CID marine engines and is intended for use with the Sierra 18-1998-1 exhaust manifold.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-0603 the same as GLM 39920?\u003c\/strong\u003e Yes, Sierra 18-0603 is interchangeable with GLM 39920, so it can be used as a direct replacement wherever that gasket set is called for.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included in the Sierra 18-0603 gasket set?\u003c\/strong\u003e The set contains exhaust manifold gaskets (18-0183-1) along with exhaust elbow gaskets, giving you the matched gaskets needed for a full manifold installation.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many gaskets come in the 18-0603 set?\u003c\/strong\u003e The Sierra 18-0603 kit is packaged as a single unit count set containing exhaust manifold gaskets and exhaust elbow gaskets for one complete installation.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color is the Sierra 18-0603 gasket set?\u003c\/strong\u003e The gaskets in the Sierra 18-0603 set are white.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-0603 gasket set weigh?\u003c\/strong\u003e The Sierra 18-0603 Exhaust Manifold Gasket Set weighs 0.33 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-0603 gasket set work with any exhaust manifold?\u003c\/strong\u003e No, the 18-0603 set is specifically intended for use with the Sierra 18-1998-1 exhaust manifold on Ford 302-351 CID engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-0603 gasket set genuine OEM or aftermarket?\u003c\/strong\u003e The 18-0603 is a Sierra-manufactured replacement gasket set built to meet or exceed the specifications of the original equipment part it replaces, rather than a factory OEM part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan the 18-0603 gasket set be used on a closed cooling system?\u003c\/strong\u003e The Sierra 18-0603 Exhaust Manifold Gasket Set is suited for exhaust manifold installations on Ford 302-351 CID engines using the 18-1998-1 manifold.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat part number should I order to replace worn exhaust manifold gaskets on a Ford 302-351 CID marine engine?\u003c\/strong\u003e Sierra part number 18-0603 is the correct gasket set for replacing the exhaust manifold gaskets on a Ford 302-351 CID engine equipped with the 18-1998-1 manifold.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988084011227,"sku":"SIE-18-0603","price":34.64,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-0603_lg__66405.1558118802.500.750.jpg?v=1785188246"},{"product_id":"exhaust-seal-18-0617-for-yamaha-f75-f80-f90-f100-f115-outboards-replaces-67f-41138-00-00","title":"Sierra Exhaust Seal 18-0617 for Yamaha F75\/F80\/F90\/F100\/F115 Outboards, Replaces 67F-45127-00-00","description":"\u003cp\u003eThe Sierra Exhaust Seal, part number 18-0617, is a replacement seal engineered for the exhaust system of specific Yamaha four-stroke outboard engines. It is designed as a direct equivalent to the OEM Yamaha seal, restoring a proper exhaust seal at the point it is installed and helping prevent exhaust leaks, water intrusion, or loss of exhaust pressure that can occur once the original seal wears out or hardens with age and heat cycling.\u003c\/p\u003e\u003cp\u003eThis seal is intended for outboards in the Yamaha F75, F80, F90, F100, and F115 model range, and is a routine maintenance and repair item for owners servicing the exhaust system on these engines. Replacing a worn exhaust seal with the correct part helps maintain proper engine operation and prevents secondary issues that can result from an exhaust leak going unaddressed. At 0.7 pounds, it ships as a compact, easy-to-handle component suited for do-it-yourself installation or use by a marine service technician during a routine exhaust system service.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-0617\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Name:\u003c\/strong\u003e Exhaust Seal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Engine Parts\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.7 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282291549\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e 67F-45127-00-00\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eYamaha F75, 2003-Current\u003c\/li\u003e\n\u003cli\u003eYamaha F80, 1999-2003\u003c\/li\u003e\n\u003cli\u003eYamaha F90, 2003-Current\u003c\/li\u003e\n\u003cli\u003eYamaha F100, 1999-2003\u003c\/li\u003e\n\u003cli\u003eYamaha F115, 2000-Current\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e67F-45127-00-00\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-0617 exhaust seal fit?\u003c\/strong\u003e The Sierra 18-0617 exhaust seal fits Yamaha F75 (2003-Current), F80 (1999-2003), F90 (2003-Current), F100 (1999-2003), and F115 (2000-Current) outboard engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part number does 18-0617 replace?\u003c\/strong\u003e Sierra part 18-0617 replaces Yamaha OEM part number 67F-45127-00-00.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does this exhaust seal weigh?\u003c\/strong\u003e The Sierra 18-0617 exhaust seal weighs 0.7 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs 18-0617 a genuine Yamaha part or an aftermarket replacement?\u003c\/strong\u003e 18-0617 is a Sierra-branded replacement part manufactured to match the fit and function of Yamaha OEM part 67F-45127-00-00, not a genuine Yamaha-branded part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill this seal fit a Yamaha F100 from any model year?\u003c\/strong\u003e The Sierra 18-0617 exhaust seal is listed for the Yamaha F100 for the 1999-2003 model years specifically.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes this seal fit the Yamaha F115?\u003c\/strong\u003e Yes, the Sierra 18-0617 exhaust seal fits the Yamaha F115 for 2000-Current model years.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat symptoms indicate this exhaust seal needs replacement?\u003c\/strong\u003e A worn or failed exhaust seal like the Sierra 18-0617 can allow an exhaust leak or water intrusion at the seal location, which is a common reason to replace it during outboard servicing.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I use the UPC to confirm I am ordering the correct part?\u003c\/strong\u003e Yes, the Sierra 18-0617 exhaust seal carries UPC 808282291549, which can be used to verify you are ordering the correct item.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the Yamaha F80 use the same seal as the F90?\u003c\/strong\u003e Yes, the Sierra 18-0617 exhaust seal covers both the Yamaha F80 (1999-2003) and F90 (2003-Current) among its listed fitments.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this a common maintenance item to replace?\u003c\/strong\u003e Exhaust seals such as the Sierra 18-0617 are a routine wear item replaced during exhaust system service on the covered Yamaha outboard models.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988084043995,"sku":"SIE-18-0617","price":2.39,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-0617__13580.1558184457.500.750.jpg?v=1785329159"},{"product_id":"sierra-18-0604-exhaust-manifold-gasket-set-for-gm-283-305-307-350-cid-volvo-penta-307-350-cid-marine-engines-1968-1980","title":"Sierra 18-0604 Exhaust Manifold Gasket Set - GM 305-350 CID Engines","description":"\u003cp\u003eThe Sierra 18-0604 Exhaust Manifold Gasket Set is a replacement gasket kit for GM 305-350 CID marine engines, designed for use with exhaust manifold 18-1997-1. The set contains two exhaust elbow gaskets and two 18-2949 exhaust manifold gaskets, giving you the seals needed to reseat the manifold and elbow assembly during a rebuild or gasket replacement. The gaskets are white in color and are built to meet or exceed the specifications of the original equipment parts they replace, making them a reliable choice when servicing a GM small block V8 marine exhaust system. Because exhaust manifold gaskets are subject to constant heat cycling and exposure to exhaust gases and cooling water, replacing them with a properly sized, purpose-built set like the 18-0604 helps prevent water intrusion, exhaust leaks, and manifold corrosion. This gasket set is interchangeable with GLM 39910, so it can be used as a direct swap wherever that number is called for. Whether you are pulling a manifold for inspection, replacing a leaking gasket, or performing routine maintenance on a GM 305-350 CID marine engine, the 18-0604 set provides the correct gaskets for the job in one package.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-0604\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Exhaust Manifold Gasket Set\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment:\u003c\/strong\u003e GM 305-350 CID Engines\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUse With Manifold:\u003c\/strong\u003e 18-1997-1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded Components:\u003c\/strong\u003e (2) Exhaust Elbow Gaskets, (2) 18-2949 Exhaust Manifold Gaskets\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInterchangeable With:\u003c\/strong\u003e GLM 39910\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e White\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282242787\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.37 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eGM 305-350 CID Engines\u003c\/li\u003e\n\u003cli\u003eUse with Manifold: 18-1997-1\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eGLM 39910\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-0604 exhaust manifold gasket set fit?\u003c\/strong\u003e The 18-0604 gasket set is designed for GM 305-350 CID marine engines and is used with exhaust manifold 18-1997-1.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-0604 interchangeable with any other part numbers?\u003c\/strong\u003e Yes, the Sierra 18-0604 exhaust manifold gasket set is interchangeable with GLM 39910.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included in the 18-0604 gasket set?\u003c\/strong\u003e Two exhaust elbow gaskets and two 18-2949 exhaust manifold gaskets are included in the Sierra 18-0604 set.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich manifold does the 18-0604 gasket set pair with?\u003c\/strong\u003e This gasket set is used with exhaust manifold 18-1997-1 on GM 305-350 CID engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color are the gaskets in the Sierra 18-0604 set?\u003c\/strong\u003e The gaskets in the 18-0604 set are white.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-0604 gasket set weigh?\u003c\/strong\u003e The Sierra 18-0604 exhaust manifold gasket set weighs 0.37 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the Sierra 18-0604 meet OEM specifications?\u003c\/strong\u003e Sierra states that the 18-0604 gasket set meets or exceeds the original equipment part it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many exhaust elbow gaskets come in the 18-0604 set?\u003c\/strong\u003e The set includes two exhaust elbow gaskets along with two 18-2949 exhaust manifold gaskets.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDo I need a separate mounting kit to install the 18-0604 gasket set?\u003c\/strong\u003e The 18-0604 gasket set itself does not include a mounting kit; the manifold it pairs with, 18-1997-1, uses mounting kit 18-8536 with its own manifold gasket and bolts.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-0604 gasket set?\u003c\/strong\u003e The UPC for the Sierra 18-0604 exhaust manifold gasket set is 808282242787.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988084306139,"sku":"SIE-18-0604","price":32.46,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-0604_lg__09486.1558118853.500.750.jpg?v=1785188963"},{"product_id":"exhaust-elbow-riser-gasket-rm0002-for-pleasurecraft-ford-small-block-v8-302-351-inboard-pkg-of-2","title":"Sierra Exhaust Riser Gasket 18-0677-1-9, Fits 18-1899 Riser, Pack of 2","description":"\u003cp\u003eThe Sierra 18-0677-1-9 is an exhaust riser gasket sold in a package of 2, designed for use with the Sierra 18-1899 riser (3 inch outlet). This gasket seals the connection point on the exhaust riser, helping maintain a leak-free joint that keeps exhaust gases and cooling water properly routed away from the engine compartment. It is also included as a component in the Sierra 18-8504 mounting kit, which bundles the gasket together with the mounting bolts needed to install the 18-1899 riser.\u003c\/p\u003e\u003cp\u003eBecause exhaust riser gaskets are a wear item that degrade with heat cycling and vibration, keeping a spare pack of 2 on hand makes it easy to replace the gasket whenever the riser is removed for service or replacement, without having to purchase a full mounting kit if the bolts are still in good condition. This gasket is specific to the 18-1899 riser application; it is not the same gasket used with the 18-1996 manifold, which instead uses the Sierra 18-0183-1 manifold gasket.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-0677-1-9\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Name:\u003c\/strong\u003e Exhaust Elbow Gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity:\u003c\/strong\u003e 2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.04 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282381417\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUsed With:\u003c\/strong\u003e Sierra 18-1899 Riser (3 inch outlet)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded In:\u003c\/strong\u003e Sierra 18-8504 Mounting Kit\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eSierra 18-1899 exhaust riser (3 inch outlet)\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eNo manufacturer catalog cross-reference numbers are listed for this gasket\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is the Sierra 18-0677-1-9 gasket used for?\u003c\/strong\u003e It is an exhaust riser gasket that seals the connection on the Sierra 18-1899 exhaust riser, which has a 3 inch outlet.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes this gasket fit the 18-1899 exhaust riser?\u003c\/strong\u003e Yes, the 18-0677-1-9 gasket is designated for use with the Sierra 18-1899 riser.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many gaskets are included in this package?\u003c\/strong\u003e Each package of the 18-0677-1-9 gasket contains 2 gaskets.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this gasket also sold as part of a mounting kit?\u003c\/strong\u003e Yes, this gasket is included in the Sierra 18-8504 mounting kit, which also contains the mounting bolts for the 18-1899 riser.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-0677-1-9 gasket package weigh?\u003c\/strong\u003e The package weighs 0.04 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-0677-1-9 gasket the same one used with the 18-1996 manifold?\u003c\/strong\u003e No, the 18-1996 manifold uses a different gasket, the Sierra 18-0183-1 manifold gasket, which is included in the separate 18-8503 mounting kit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDo I need to buy new mounting bolts when replacing this gasket?\u003c\/strong\u003e Mounting bolts are not included with the 18-0677-1-9 gasket pack on its own; they come bundled only in the Sierra 18-8504 mounting kit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat UPC is associated with this gasket?\u003c\/strong\u003e The UPC for the Sierra 18-0677-1-9 exhaust riser gasket is 808282381417.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I buy just the gasket instead of the full mounting kit?\u003c\/strong\u003e Yes, the 18-0677-1-9 is sold separately as a pack of 2 gaskets, apart from the 18-8504 mounting kit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat part does the 18-0677-1-9 gasket connect to on the riser?\u003c\/strong\u003e It seals the mounting joint of the Sierra 18-1899 riser, which is the riser with a 3 inch outlet.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988084437211,"sku":"SIE-18-0677-1-9","price":11.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/18-0677-9__43049.1739458545.500.750.jpg?v=1785329159"},{"product_id":"sierra-18-0672-9-exhaust-elbow-gasket-replaces-mercruiser-27-860231-27-863725-2-pack","title":"Sierra 18-0672-9 Exhaust Elbow Gasket, Replaces Mercruiser 27-8637251, 27-860231, 27-863725, 27-41811, 2-Pack","description":"\u003cp\u003eThe Sierra 18-0672-9 Exhaust Elbow Gasket seals the connection between the exhaust manifold elbow and manifold on inboard and sterndrive engine exhaust systems, preventing exhaust and coolant leaks at the joint. It is sold priced per 2-pack, so each purchase includes a pair of gaskets for a complete elbow gasket replacement. Sierra manufactures this gasket to meet or exceed the quality of the original equipment part it replaces, making it a reliable choice when servicing your exhaust elbow assembly. The gasket is built from a denim material in a multi-colored finish. It is designed to work with Sierra's manifold elbow 18-1970-2 (a 3 inch hose, 0 degree down angle elbow), which in turn fits Sierra manifold 18-1952-1, and it is one of the elbow gaskets called for when installing mounting kits 18-8529 or 18-8555. This gasket is also a direct interchange for several Mercruiser OEM part numbers, so it can be used as a drop-in replacement during routine maintenance or when rebuilding the exhaust elbow connection. Keep spares on hand whenever the elbow or manifold is removed, since exhaust gaskets should be replaced any time the joint is disassembled.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-0672-9\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity:\u003c\/strong\u003e 2 gaskets per pack\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.09 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Denim\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e Multi-Colored\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282166687\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Manifold Elbow:\u003c\/strong\u003e 18-1970-2 (3 inch hose, 0 degree down angle)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Manifold:\u003c\/strong\u003e 18-1952-1\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eFits Sierra manifold elbow 18-1970-2 (3 inch hose, 0 degree down angle)\u003c\/li\u003e\n\u003cli\u003eUsed with Sierra manifold 18-1952-1\u003c\/li\u003e\n\u003cli\u003eCalled for with mounting kit 18-8529 or mounting kit 18-8555\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMercruiser 27-8637251\u003c\/li\u003e\n\u003cli\u003eMercruiser 27-860231\u003c\/li\u003e\n\u003cli\u003eMercruiser 27-863725\u003c\/li\u003e\n\u003cli\u003eMercruiser 27-41811\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-0672-9 gasket fit?\u003c\/strong\u003e The Sierra 18-0672-9 exhaust elbow gasket is designed for use with Sierra's manifold elbow 18-1970-2, a 3 inch hose, 0 degree down angle elbow that fits Sierra manifold 18-1952-1.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many gaskets come in a pack?\u003c\/strong\u003e The 18-0672-9 gasket is priced and sold as a 2-pack, so each order includes two gaskets for a complete elbow gasket replacement.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-0672-9 gasket a genuine Mercruiser part?\u003c\/strong\u003e No, it is a Sierra-manufactured aftermarket gasket, but it is built to meet or exceed the quality of the original equipment part it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM Mercruiser part numbers does 18-0672-9 replace?\u003c\/strong\u003e This gasket interchanges with Mercruiser part numbers 27-8637251, 27-860231, 27-863725, and 27-41811.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-0672-9 gasket weigh?\u003c\/strong\u003e The 2-pack of Sierra 18-0672-9 exhaust elbow gaskets weighs 0.09 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is the 18-0672-9 gasket made from?\u003c\/strong\u003e The Sierra 18-0672-9 exhaust elbow gasket is made from a denim material.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I use the 18-0672-9 gasket with a different manifold elbow?\u003c\/strong\u003e The 18-0672-9 gasket is designated for Sierra's 18-1970-2 manifold elbow assembly; check your existing elbow and manifold part numbers before ordering to confirm a match.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDo I need a mounting kit along with this gasket?\u003c\/strong\u003e The 18-0672-9 gasket is one of the elbow gaskets called for in Sierra mounting kits 18-8529 and 18-8555, which may be needed depending on your manifold spacer setup.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen should I replace the exhaust elbow gasket?\u003c\/strong\u003e Any time the exhaust manifold elbow is removed from the manifold, such as during service or replacement of the 18-1970-2 elbow, the 18-0672-9 gasket should be replaced to maintain a proper seal.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color is the Sierra 18-0672-9 gasket?\u003c\/strong\u003e The 18-0672-9 gasket has a multi-colored finish.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-0672-9 gasket sold individually or as a set?\u003c\/strong\u003e It is sold as a 2-pack, not individually, providing both gaskets needed for the elbow connection in one purchase.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988084502747,"sku":"SIE-18-0672-9","price":25.28,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-0672_lg__62935.1558121249.500.750.jpg?v=1785188167"},{"product_id":"sierra-18-0720-closed-dry-joint-exhaust-gasket-replaces-mercruiser-27-864549a02-fits-4-3l-5-0l-5-7l-6-2l","title":"Sierra 18-0720 Closed Dry-Joint Gasket, Replaces Mercruiser 27-864549A02, Fits 4.3L Alpha\/Bravo (2002 and Newer)","description":"\u003cp\u003eThe Sierra 18-0720 is a Closed Dry-Joint Gasket engineered for MerCruiser 4.3L Alpha and Bravo drive applications built 2002 and newer without engine catalyst. It seals the joint between the dry-joint exhaust manifold and riser, a design used on modern MerCruiser sterndrive engines to keep raw cooling water separated from the exhaust path at the manifold-to-riser connection. The gasket is round in shape and finished in white, and is sized to mate directly with the Sierra 18-1843 manifold and Sierra 18-1845 riser, making it a straightforward drop-in replacement when servicing or resealing this joint.\u003c\/p\u003e\u003cp\u003eThis is the \"Closed\" style gasket in Sierra's dry-joint gasket lineup; the same part family is also offered in Open (18-0721) and Restricted (18-0722) configurations, so it is important to confirm the closed-style gasket is the correct one for your manifold-to-riser setup before ordering. The gasket directly replaces Mercruiser 27-864549A02 and 27-864549A01, letting owners source a Sierra-branded equivalent without hunting down the original Mercruiser part number. As with all Sierra engine and drive parts, it is built to meet or exceed the specifications of the original equipment part it replaces and is designed to hold up to the heat and corrosion exposure of the marine exhaust environment.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-0720\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Closed Dry-Joint Gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e White\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShape:\u003c\/strong\u003e Round\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.25 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282359447\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment:\u003c\/strong\u003e MerCruiser 4.3L Alpha\/Bravo, 2002 and newer, without engine catalyst\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUse With:\u003c\/strong\u003e Manifold Sierra Part Number 18-1843 and Riser Sierra Part Number 18-1845\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRelated Variants:\u003c\/strong\u003e Open Dry-Joint Gasket 18-0721, Restricted Dry-Joint Gasket 18-0722\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eMerCruiser 4.3L Alpha\/Bravo, 2002 and newer, without engine catalyst\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMercruiser 27-864549A02\u003c\/li\u003e\n\u003cli\u003eMercruiser 27-864549A01\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-0720 gasket fit?\u003c\/strong\u003e The Sierra 18-0720 Closed Dry-Joint Gasket fits MerCruiser 4.3L Alpha and Bravo drive applications built 2002 and newer without engine catalyst.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat Mercruiser part numbers does 18-0720 replace?\u003c\/strong\u003e It replaces Mercruiser 27-864549A02 and 27-864549A01.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-0720 an Open, Closed, or Restricted style gasket?\u003c\/strong\u003e It is the Closed style dry-joint gasket. Sierra also offers this same gasket in an Open style (18-0721) and a Restricted style (18-0722), so confirm which style your manifold-to-riser joint requires before ordering.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat manifold and riser does this gasket pair with?\u003c\/strong\u003e The 18-0720 gasket is used with the Sierra 18-1843 manifold and Sierra 18-1845 riser at the dry-joint connection between them.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color and shape is the 18-0720 gasket?\u003c\/strong\u003e It is a round gasket finished in white.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-0720 gasket weigh?\u003c\/strong\u003e The Sierra 18-0720 Closed Dry-Joint Gasket weighs 0.25 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-0720 gasket genuine Sierra or an aftermarket copy?\u003c\/strong\u003e It is a genuine Sierra-branded part, engineered to meet or exceed the specifications of the original Mercruiser equipment it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the difference between 18-0720, 18-0721, and 18-0722?\u003c\/strong\u003e 18-0720 is the Closed style dry-joint gasket, 18-0721 is the Open style, and 18-0722 is the Restricted style; all three are part of the same dry-joint gasket family but are not interchangeable, so the correct style must be matched to the manifold-and-riser setup.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-0720 gasket work on engines with a catalyst?\u003c\/strong\u003e No, the 18-0720 is fitted to MerCruiser 4.3L Alpha\/Bravo applications 2002 and newer without engine catalyst.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included when I order the 18-0720?\u003c\/strong\u003e You receive one Sierra 18-0720 Closed Dry-Joint Gasket, sized for the joint between the 18-1843 manifold and 18-1845 riser.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988085584091,"sku":"SIE-18-0720","price":54.56,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-0720__87403.1558184516.500.750.jpg?v=1785187985"},{"product_id":"sierra-18-0721-open-dry-joint-riser-gasket-replaces-mercruiser-27-864547a02-fits-4-3l-5-0l-5-7l-6-2l-dry-joint-manifold-and-riser","title":"Sierra 18-0721 Open Dry-Joint Exhaust Gasket, Replaces Mercruiser 27-864547A02\/27-864547A01, Fits 4.3L Alpha\/Bravo 2002 and Newer","description":"\u003cp\u003eThe Sierra 18-0721 is an Open-style dry-joint exhaust gasket engineered as a direct replacement for the original equipment gasket on MerCruiser 4.3L Alpha\/Bravo sterndrive applications built 2002 and newer without engine catalyst. Dry-joint gaskets seal the mating surface between the exhaust manifold and riser, and choosing the correct style matters: this is the Open variant, part of a three-style family (Open, Closed, and Restricted) that all share a common mounting footprint but differ in how they route exhaust flow. Installing the wrong style can affect engine cooling and exhaust backpressure, so confirming 18-0721 against your existing gasket or manufacturer reference before ordering is important.\u003c\/p\u003e\u003cp\u003eThis gasket is round in shape and finished in white, and is sold as a single unit for one exhaust joint. It directly replaces the Mercruiser OEM gasket numbers 27-864547A02 and 27-864547A01, so it can be used as a drop-in service part during manifold or riser replacement, tune-up, or routine maintenance where the old dry-joint seal has failed or is showing signs of leakage or corrosion. Sierra manufactures the 18-0721 to meet or exceed the specifications of the original equipment part it replaces, making it a reliable choice for engine and drive maintenance in the demanding marine environment.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-0721\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eItem Type:\u003c\/strong\u003e Dry Joint Gasket (Open)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShape:\u003c\/strong\u003e Round\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e White\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.25 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282359454\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits:\u003c\/strong\u003e 4.3L Alpha\/Bravo (2002 and newer without engine catalyst)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRelated Gasket Styles:\u003c\/strong\u003e 18-0720 (Closed), 18-0722 (Restricted)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReplaces (OEM):\u003c\/strong\u003e 27-864547A02, 27-864547A01\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eMercruiser 4.3L Alpha\/Bravo sterndrive, 2002 and newer, without engine catalyst\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e27-864547A02\u003c\/li\u003e\n\u003cli\u003e27-864547A01\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-0721 gasket fit?\u003c\/strong\u003e The 18-0721 is designed for MerCruiser 4.3L Alpha\/Bravo sterndrive applications built 2002 and newer without engine catalyst.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part numbers does the 18-0721 replace?\u003c\/strong\u003e It replaces Mercruiser 27-864547A02 and 27-864547A01, making it a direct swap for either of those original equipment gasket numbers.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs 18-0721 the Open, Closed, or Restricted dry-joint gasket?\u003c\/strong\u003e 18-0721 is the Open-style dry-joint gasket. Sierra also offers 18-0720 as the Closed style and 18-0722 as the Restricted style for the same joint.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-0721 gasket weigh?\u003c\/strong\u003e The gasket weighs 0.25 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color and shape is the 18-0721 gasket?\u003c\/strong\u003e It is round in shape and white in color.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-0721 come with mounting hardware?\u003c\/strong\u003e The 18-0721 is sold as a single gasket unit; it does not include the manifold, riser, or fastening hardware.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow do I know if I need the Open, Closed, or Restricted version?\u003c\/strong\u003e Match the style to the gasket currently installed or to your manifold and riser specification, since 18-0720, 18-0721, and 18-0722 share a mounting footprint but route exhaust flow differently.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-0721 genuine OEM or aftermarket?\u003c\/strong\u003e The 18-0721 is a Sierra-manufactured replacement part, built to meet or exceed the specifications of the Mercruiser 27-864547A02\/27-864547A01 gasket it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill 18-0721 fit a 4.3L engine with a catalyst-equipped exhaust?\u003c\/strong\u003e No, this gasket is specified for 4.3L Alpha\/Bravo applications 2002 and newer without engine catalyst.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-0721?\u003c\/strong\u003e The UPC for Sierra 18-0721 is 808282359454.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988085616859,"sku":"SIE-18-0721","price":65.35,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-0721__80767.1713451370.500.750.jpg?v=1785188213"},{"product_id":"sierra-18-0722-restricted-dry-joint-riser-gasket-replaces-mercruiser-27-864850a02-fits-4-3l-5-0l-5-7l-6-2l-dry-joint-manifold-riser","title":"Sierra 18-0722 Restricted Dry-Joint Exhaust Gasket, Replaces Mercruiser 27-864850A02\/27-864850A01, Fits 4.3L Alpha\/Bravo 2002 and Newer","description":"\u003cp\u003eThe Sierra 18-0722 is a Restricted Dry-Joint Gasket engineered for the dry-joint exhaust manifold and riser assembly on 4.3L Alpha\/Bravo sterndrive engines built 2002 and newer without an engine catalyst. It seals the joint between the exhaust manifold and riser, and its restricted design controls exhaust and cooling water flow through that joint to the manufacturer's original specification. This gasket is one of three dry-joint gasket styles Sierra offers for this application - open, closed, and restricted - so it is important to confirm that a restricted style is the correct replacement for your engine before ordering.\u003c\/p\u003e\u003cp\u003eThe 18-0722 is intended for use with Sierra's dry-joint manifold (Sierra Part Number 18-1843) and riser (Sierra Part Number 18-1845), and it is also listed alongside Sierra's dry-joint elbow gaskets 18-0720 and 18-0721 as part of the same gasket family. It directly replaces Mercruiser part numbers 27-864850A02 and 27-864850A01, making it a straightforward like-for-like swap when servicing the exhaust manifold-to-riser joint. The gasket is round in shape and finished in white.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-0722\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGasket Style:\u003c\/strong\u003e Restricted\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShape:\u003c\/strong\u003e Round\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e White\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.25 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282359461\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUsed With:\u003c\/strong\u003e Sierra Manifold 18-1843 and Sierra Riser 18-1845\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRelated Dry-Joint Elbow Gaskets:\u003c\/strong\u003e 18-0720 (Closed), 18-0721 (Open)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits:\u003c\/strong\u003e 4.3L Alpha\/Bravo (2002 and Newer without Engine Catalyst)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eFits 4.3L Alpha\/Bravo applications, 2002 and newer, without engine catalyst. Used with the dry-joint manifold and riser on 4.3L, 5.0L, 5.7L, and 6.2L engines.\u003c\/p\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cp\u003eReplaces Mercruiser 27-864850A02 and 27-864850A01.\u003c\/p\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-0722 gasket fit?\u003c\/strong\u003e The Sierra 18-0722 fits 4.3L Alpha\/Bravo sterndrive applications built 2002 and newer without an engine catalyst, and is used with the dry-joint manifold and riser on 4.3L, 5.0L, 5.7L, and 6.2L engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part numbers does the 18-0722 replace?\u003c\/strong\u003e It replaces Mercruiser part numbers 27-864850A02 and 27-864850A01.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-0722 the open, closed, or restricted style gasket?\u003c\/strong\u003e Sierra 18-0722 is the restricted style dry-joint gasket; Sierra also offers 18-0720 as the closed style and 18-0721 as the open style for the same application.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat manifold and riser does this gasket work with?\u003c\/strong\u003e The 18-0722 restricted gasket is designed for use with Sierra's dry-joint manifold, Sierra Part Number 18-1843, and Sierra's dry-joint riser, Sierra Part Number 18-1845.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow do I know if I need the restricted, open, or closed gasket style?\u003c\/strong\u003e The three Sierra dry-joint gaskets - 18-0720 (closed), 18-0721 (open), and 18-0722 (restricted) - control exhaust and cooling water flow differently through the manifold-to-riser joint, so match the style to what your original gasket was to ensure correct flow through the joint.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat shape and color is the 18-0722 gasket?\u003c\/strong\u003e The Sierra 18-0722 is a round gasket finished in white.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-0722 gasket weigh?\u003c\/strong\u003e The Sierra 18-0722 restricted dry-joint gasket weighs 0.25 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-0722 a genuine Sierra part or aftermarket equivalent?\u003c\/strong\u003e The 18-0722 is a genuine Sierra part manufactured to meet or exceed the original Mercruiser part it replaces, 27-864850A02\/27-864850A01.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-0722 fit engines with an engine catalyst?\u003c\/strong\u003e No, the fitment for the 18-0722 is specified as 4.3L Alpha\/Bravo, 2002 and newer, without engine catalyst.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-0722 gasket?\u003c\/strong\u003e The Sierra 18-0722 restricted dry-joint gasket carries UPC 808282359461.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan the 18-0722 be used with the 18-0720 or 18-0721 gaskets on the same joint?\u003c\/strong\u003e No, only one gasket style is used per joint; 18-0720, 18-0721, and 18-0722 are alternative styles for the same dry-joint manifold-to-riser application, not parts used together.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988085715163,"sku":"SIE-18-0722","price":54.85,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-0722__53775.1558184523.500.750.jpg?v=1785188055"},{"product_id":"sierra-18-0823-exhaust-manifold-gasket-for-yamaha-outboard-replaces-oem-6e5-13645-a1-00","title":"Sierra Exhaust Manifold Gasket 18-0823 for Yamaha Outboard, Replaces 6E5-41112-A1-00","description":"\u003cp\u003eThe Sierra 18-0823 is an exhaust manifold gasket engineered for Yamaha outboard engines. It seals the joint between the exhaust manifold and the powerhead, containing exhaust gases and cooling water so the manifold runs leak-free and the cooling circuit stays sealed under engine heat and vibration. This gasket is a direct cross to Yamaha OEM part 6E5-41112-A1-00, giving you a genuine-fit replacement without having to source through the engine manufacturer. Two gaskets are used per engine application, so plan to order accordingly when doing a manifold service or full gasket set replacement. As with any exhaust manifold gasket, install it dry (unless the engine manual specifies otherwise), torque the manifold fasteners to the engine manufacturer's spec in the proper sequence, and replace the gasket any time the manifold is removed rather than reusing the old one. The round gasket ships as a single component, ready to install, and is sized and shaped to match the mounting pattern of the Yamaha manifold it services.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-0823\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Exhaust Manifold Gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Yamaha Outboard\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShape:\u003c\/strong\u003e Round\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity Required Per Engine:\u003c\/strong\u003e 2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.08 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282257446\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e 6E5-41112-A1-00\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eYamaha outboard engines using OEM exhaust manifold gasket 6E5-41112-A1-00\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e6E5-41112-A1-00\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-0823 gasket fit?\u003c\/strong\u003e The Sierra 18-0823 is an exhaust manifold gasket built for Yamaha outboard engines, cross-referencing to Yamaha OEM part 6E5-41112-A1-00.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs 18-0823 the same as Yamaha part 6E5-41112-A1-00?\u003c\/strong\u003e Yes, Sierra 18-0823 is the direct cross-reference replacement for Yamaha OEM exhaust manifold gasket 6E5-41112-A1-00.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many gaskets do I need for one engine?\u003c\/strong\u003e Two of the Sierra 18-0823 exhaust manifold gaskets are required per engine application.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat shape is this gasket?\u003c\/strong\u003e The 18-0823 exhaust manifold gasket is round in shape.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-0823 gasket weigh?\u003c\/strong\u003e Sierra part 18-0823 weighs 0.08 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included when I order this part?\u003c\/strong\u003e Ordering Sierra 18-0823 gets you one exhaust manifold gasket; since two are required per engine, order two units for a complete job.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this a genuine Sierra part or aftermarket?\u003c\/strong\u003e The 18-0823 is a Sierra-branded exhaust manifold gasket manufactured as a cross-reference replacement for the Yamaha OEM gasket, not an OEM Yamaha part itself.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eShould I reuse the old exhaust manifold gasket instead of buying 18-0823?\u003c\/strong\u003e No, exhaust manifold gaskets like the Sierra 18-0823 should be replaced any time the manifold is removed rather than reused, to ensure a proper seal.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-0823 gasket need sealant during installation?\u003c\/strong\u003e Sierra 18-0823 is a standard exhaust manifold gasket; follow your engine manufacturer's torque sequence and sealant guidance when installing it.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat UPC is associated with Sierra 18-0823?\u003c\/strong\u003e The UPC for the Sierra 18-0823 exhaust manifold gasket is 808282257446.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I use 18-0823 on a non-Yamaha outboard?\u003c\/strong\u003e Sierra 18-0823 is designed for Yamaha outboard applications matching OEM part 6E5-41112-A1-00; fitment outside that application is not confirmed.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988085747931,"sku":"SIE-18-0823","price":7.34,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-0823_lg__34400.1558120846.500.750.jpg?v=1785188556"},{"product_id":"sierra-18-0680-exhaust-manifold-gasket-for-mercruiser-3-0l-3-0lx-replaces-27-815528-omc-3853256","title":"Sierra 18-0680 Exhaust Manifold Gasket, Replaces 912164, Pack of 2","description":"\u003cp\u003eThe Sierra 18-0680 Exhaust Manifold Gasket is a replacement gasket engineered to seal the exhaust manifold joint on inboard and sterndrive engines, sealing against exhaust gas and coolant leakage at the manifold mating surface. It is built to meet or exceed the quality of the original equipment part it replaces, giving installers a dependable seal without the premium of a dealer-sourced OEM part. The gasket is round in shape and finished in white, and it ships as a pack of 2, which covers a typical single-manifold replacement or gives a spare on hand for a future service. Because exhaust manifold gaskets are compression-sealed and exposed to repeated heat cycling, they are a wear item that should be replaced any time the manifold is removed for service, rather than reused. This gasket carries the Sierra part number 18-0680 and directly replaces OEM number 912164, making it straightforward to identify against the number stamped on or referenced for the original gasket being removed. At 0.03 pounds, it is a lightweight, low-cost component that is inexpensive insurance against exhaust leaks compared to the labor cost of re-pulling a manifold to fix a failed seal.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-0680\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Exhaust Manifold Gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity:\u003c\/strong\u003e Pack of 2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e White\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShape:\u003c\/strong\u003e Round\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.03 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282105938\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e912164\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-0680 gasket fit?\u003c\/strong\u003e The 18-0680 is an exhaust manifold gasket that seals the manifold mating joint and directly replaces OEM number 912164.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs OEM part number 912164 the same as the Sierra 18-0680?\u003c\/strong\u003e Yes, Sierra 18-0680 is the direct replacement for OEM number 912164, so it can be ordered in place of that original part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many gaskets come in one package of 18-0680?\u003c\/strong\u003e Each package of the 18-0680 contains 2 exhaust manifold gaskets, enough for a manifold replacement plus a spare.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color is the 18-0680 exhaust manifold gasket?\u003c\/strong\u003e The 18-0680 gasket is white in color and round in shape.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-0680 gasket weigh?\u003c\/strong\u003e The 18-0680 exhaust manifold gasket weighs 0.03 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I reuse an old exhaust manifold gasket instead of buying the 18-0680?\u003c\/strong\u003e No, exhaust manifold gaskets like the 18-0680 are compression seals meant for one-time use; reusing a removed gasket often leads to leaks since it has already been crushed to seal the original joint.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-0680 genuine OEM or aftermarket?\u003c\/strong\u003e The 18-0680 is a Sierra-brand replacement gasket built to meet or exceed the original equipment part it replaces, rather than being sourced from the original engine manufacturer.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included when I order the 18-0680?\u003c\/strong\u003e An order of the Sierra 18-0680 includes a package of 2 exhaust manifold gaskets.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy does an exhaust manifold gasket need replacing?\u003c\/strong\u003e Exhaust manifold gaskets like the 18-0680 are subjected to repeated heat cycling and compression, which over time causes them to lose their seal and allow exhaust or coolant leakage at the manifold joint.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the Sierra 18-0680 gasket handle exhaust manifold heat cycling?\u003c\/strong\u003e Yes, the 18-0680 is designed as an exhaust manifold gasket, meaning it is built to seal against the repeated heat exposure at the manifold joint.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988085846235,"sku":"SIE-18-0680","price":16.69,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-0680_lg__46689.1558121722.500.750.jpg?v=1785188494"},{"product_id":"exhaust-elbow-mounting-gasket-18-0881-1-for-mercruiser-3-7l-224-cid-4-cylinder-models-165-170-180-190","title":"Sierra Exhaust Elbow Gasket 18-0881-1 for MerCruiser 3.7L 170\/180 HP Aluminum Exhaust Manifolds","description":"\u003cp\u003eThe Sierra 18-0881-1 is an exhaust elbow gasket engineered as a direct-fit seal for MerCruiser 3.7L 224 cid 4-cylinder sterndrive engines equipped with aluminum exhaust manifolds. It seals the mating surface between the exhaust manifold and exhaust elbow, containing hot exhaust gas and cooling water so the joint stays leak-free under the heat cycling and vibration typical of marine engine operation. Because this gasket is specified for the aluminum manifold configuration rather than the cast iron version, it is engineered to match the mounting geometry and surface finish of aluminum manifold assemblies specifically -- installing the wrong gasket variant on the wrong manifold material can lead to a poor seal and coolant or exhaust leakage.\u003c\/p\u003e\u003cp\u003eThis gasket applies to MerCruiser 3.7L engines rated at 170 HP (1985-1986 model years, serial numbers 6916779 through B434940) and 180 HP (1987 model year, serial numbers B436391 through B775248), both using the 224 cid 4-cylinder block with aluminum exhaust manifolds. At 0.14 pounds, it is a lightweight, precision-cut flat gasket intended as a one-for-one replacement during exhaust manifold or exhaust elbow service, gasket refresh after removal, or routine maintenance where the manifold-to-elbow joint is disturbed.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-0881-1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Name:\u003c\/strong\u003e Exhaust Elbow Gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.14 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282365820\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine Application:\u003c\/strong\u003e MerCruiser 3.7L, 224 cid, 4-cylinder\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExhaust Manifold Type:\u003c\/strong\u003e Aluminum exhaust manifold configuration\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHorsepower Ratings:\u003c\/strong\u003e 170 HP and 180 HP\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel Years:\u003c\/strong\u003e 1985-1986 (170 HP), 1987 (180 HP)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSerial Number Range:\u003c\/strong\u003e 6916779 - B434940 (170 HP); B436391 - B775248 (180 HP)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMerCruiser 3.7L, 224 cid, 4-cylinder, 170 HP, 1985-1986, serial numbers 6916779 - B434940, aluminum exhaust manifolds\u003c\/li\u003e\n\u003cli\u003eMerCruiser 3.7L, 224 cid, 4-cylinder, 180 HP, 1987, serial numbers B436391 - B775248, aluminum exhaust manifolds\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-0881-1 exhaust elbow gasket fit?\u003c\/strong\u003e It fits MerCruiser 3.7L, 224 cid, 4-cylinder engines rated at 170 HP (1985-1986, serial numbers 6916779 - B434940) and 180 HP (1987, serial numbers B436391 - B775248), specifically the versions with aluminum exhaust manifolds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes this gasket work with cast iron exhaust manifolds?\u003c\/strong\u003e No, the 18-0881-1 gasket is specified for the aluminum exhaust manifold configuration on the MerCruiser 3.7L 224 cid engine; engines with cast iron exhaust manifolds require a different gasket part number.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-0881-1 exhaust elbow gasket weigh?\u003c\/strong\u003e 0.14 pounds is the weight of the Sierra 18-0881-1 exhaust elbow gasket.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhere on the engine does this gasket install?\u003c\/strong\u003e The 18-0881-1 seals the joint between the exhaust manifold and the exhaust elbow on applicable MerCruiser 3.7L aluminum-manifold engines, sealing both exhaust gas and cooling water at that connection.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I use this gasket for a routine exhaust elbow gasket replacement?\u003c\/strong\u003e Yes, the 18-0881-1 is intended as a direct replacement gasket for service work whenever the exhaust manifold-to-elbow joint on a covered MerCruiser 3.7L aluminum-manifold engine is disassembled.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-0881-1 a genuine Sierra part or aftermarket equivalent?\u003c\/strong\u003e 18-0881-1 is the Sierra manufacturer part number for this exhaust elbow gasket, sold as Sierra's own catalog item rather than a third-party equivalent.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat model years does the 170 HP application cover?\u003c\/strong\u003e The 170 HP MerCruiser 3.7L application for the 18-0881-1 gasket covers 1985-1986 model years, engine serial numbers 6916779 through B434940.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat model years does the 180 HP application cover?\u003c\/strong\u003e 1987 is the model year for the 180 HP MerCruiser 3.7L application of the 18-0881-1 gasket, spanning serial numbers B436391 through B775248.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included when I order this part?\u003c\/strong\u003e Ordering the Sierra 18-0881-1 includes one exhaust elbow gasket sized for the MerCruiser 3.7L aluminum exhaust manifold applications listed for this part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow do I know if my engine has aluminum or cast iron exhaust manifolds?\u003c\/strong\u003e Since the 18-0881-1 gasket is built specifically for the aluminum exhaust manifold version of the MerCruiser 3.7L 224 cid engine, confirming manifold material before ordering ensures the correct gasket is installed, as the cast iron version uses a different Sierra part number.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988086239451,"sku":"SIE-18-0881-1","price":16.65,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-0881_lg__28756.1558120731.500.750.jpg?v=1785329157"},{"product_id":"exhaust-elbow-gasket-18-0897-for-mercruiser-exhaust-manifolds-replaces-27-41813-27-860233-27-863724","title":"Sierra 18-0897 Exhaust Elbow Gasket, Replaces Mercruiser 27-41813","description":"\u003cp\u003eThe Sierra 18-0897 is a round exhaust elbow gasket built to seal the mating surface between a marine exhaust manifold and its exhaust elbow (riser) on Mercruiser-style exhaust manifold setups. It is manufactured to meet or exceed the quality of the original equipment part it replaces, giving boat owners a direct, OEM-fit seal without the premium price of a dealer part.\u003c\/p\u003e\u003cp\u003eThis gasket is used as part of the mounting hardware for exhaust manifold elbow risers. In Sierra's mounting kit configuration, the 18-0897 elbow gasket is included alongside the 18-2849-1 elbow gasket for use with Manifold Spacer 18-1906 paired with Riser 18-1971 or Riser 18-1978, so it is a key seal when installing or servicing that manifold spacer and riser combination. Because it is sold individually here, it is also a convenient replacement-only purchase for anyone who already owns the elbows, spacer, and studs and simply needs a fresh, properly sized gasket to reseal the joint during a routine service or leak repair.\u003c\/p\u003e\u003cp\u003eEach gasket is a single round unit designed to be replaced any time the exhaust elbow or manifold spacer is removed, since a used gasket should not be reused once disturbed. It is interchangeable with several other aftermarket and OEM cross-reference part numbers, making it easy to source as a match for an existing Mercruiser exhaust system regardless of which brand originally supplied the gasket.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-0897\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Exhaust Elbow Gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShape:\u003c\/strong\u003e Round\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit Count:\u003c\/strong\u003e 1 gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.04 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999751720\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Mounting Kit:\u003c\/strong\u003e Included in Mounting Kit 18-8554, used with Manifold Spacer 18-1906 and Riser 18-1971 or 18-1978\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e Barr MC47-27-41813, GLM 30240, Mallory 9-61413, Mercruiser 27-41813, 27-860233, 27-863724, Osco 8503-GR\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eUsed with Manifold Spacer 18-1906 paired with Riser 18-1971 or Riser 18-1978\u003c\/li\u003e\n\u003cli\u003eIncluded as one of the elbow gaskets in Mounting Kit 18-8554\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eBarr MC47-27-41813\u003c\/li\u003e\n\u003cli\u003eGLM 30240\u003c\/li\u003e\n\u003cli\u003eMallory 9-61413\u003c\/li\u003e\n\u003cli\u003eMercruiser 27-41813\u003c\/li\u003e\n\u003cli\u003eMercruiser 27-860233\u003c\/li\u003e\n\u003cli\u003eMercruiser 27-863724\u003c\/li\u003e\n\u003cli\u003eOsco 8503-GR\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is the Sierra 18-0897 used for?\u003c\/strong\u003e The Sierra 18-0897 is a round exhaust elbow gasket that seals the joint between a marine exhaust manifold and its exhaust elbow, typically used when installing or servicing a manifold spacer and riser assembly.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-0897 gasket fit Mercruiser exhaust manifolds?\u003c\/strong\u003e Yes, the 18-0897 gasket is designed for use in Mercruiser exhaust manifold setups and is interchangeable with Mercruiser cross-reference numbers 27-41813, 27-860233, and 27-863724.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part numbers does Sierra 18-0897 replace?\u003c\/strong\u003e Part 18-0897 cross-references to Barr MC47-27-41813, GLM 30240, Mallory 9-61413, Mercruiser 27-41813, Mercruiser 27-860233, Mercruiser 27-863724, and Osco 8503-GR.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many gaskets come in one order of 18-0897?\u003c\/strong\u003e Each order of the Sierra 18-0897 includes one round exhaust elbow gasket.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-0897 exhaust elbow gasket weigh?\u003c\/strong\u003e The Sierra 18-0897 weighs 0.04 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-0897 an OEM or aftermarket gasket?\u003c\/strong\u003e The 18-0897 is a Sierra aftermarket gasket manufactured to meet or exceed the quality of the original equipment part it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat other parts is the 18-0897 gasket used with?\u003c\/strong\u003e The 18-0897 elbow gasket is included in Mounting Kit 18-8554, used alongside Manifold Spacer 18-1906 with Riser 18-1971 or Riser 18-1978.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eShould I reuse an old exhaust elbow gasket instead of buying 18-0897?\u003c\/strong\u003e No, an exhaust elbow gasket like the 18-0897 should be replaced with a new gasket any time the elbow or manifold spacer is removed, since a disturbed gasket will not reseal properly.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat shape is the Sierra 18-0897 gasket?\u003c\/strong\u003e The Sierra 18-0897 is a round gasket.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I use the Sierra 18-0897 as a direct replacement for a Barr or Mallory gasket?\u003c\/strong\u003e Yes, the 18-0897 cross-references directly to Barr MC47-27-41813 and Mallory 9-61413, so it can be used as a like-for-like replacement for those parts.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-0897 gasket?\u003c\/strong\u003e The Sierra 18-0897 exhaust elbow gasket has UPC 030999751720.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988086304987,"sku":"SIE-18-0897","price":5.82,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/18-0897__80053.1739458627.500.750.jpg?v=1785189198"},{"product_id":"sierra-18-0956-1-exhaust-manifold-gasket-for-chrysler-460-cid-inboard-replaces-118-614","title":"Sierra Exhaust Manifold Gasket 18-0956-1 for 3.7L 224 CID Chrysler Inboard Engines","description":"\u003cp\u003eThe Sierra Exhaust Manifold Gasket, part number 18-0956-1, is a round replacement gasket engineered for 3.7L 224 CID 4-cylinder Chrysler inboard marine engines. This gasket seals the connection at the exhaust manifold, maintaining a tight seal against exhaust gases and coolant while the engine runs, which helps prevent leaks that can lead to overheating or exhaust intrusion into the bilge.\u003c\/p\u003e\u003cp\u003eThis gasket is used as part of the manifold gasket application for 170 HP and 180 HP 3.7L 224 CID engines built in 1985-1986 and 1987, and it is specified for engines fitted with either aluminum or cast iron exhaust manifolds, depending on the accompanying gasket set. It ships as a single gasket unit and is finished in white. Marine exhaust manifold gaskets like this one are a wear item that should be replaced any time the exhaust manifold is removed for service, since reusing an old gasket risks an improper seal and a repeat leak.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-0956-1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Exhaust Manifold Gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShape:\u003c\/strong\u003e Round\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e White\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1 gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.2 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282365813\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eChrysler 3.7L 224 CID 4-cylinder inboard engines, 170 HP, 1985-1986, engines with aluminum exhaust manifolds, serial numbers 6916779 to B434940\u003c\/li\u003e\n\u003cli\u003eChrysler 3.7L 224 CID 4-cylinder inboard engines, 170 HP, 1985-1986, engines with cast iron exhaust manifolds, serial numbers 6916779 to B434940\u003c\/li\u003e\n\u003cli\u003eChrysler 3.7L 224 CID 4-cylinder inboard engines, 180 HP, 1987, engines with aluminum exhaust manifolds, serial numbers B436391 to B775248\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eNo OEM cross-reference numbers are listed for this gasket.\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-0956-1 exhaust manifold gasket fit?\u003c\/strong\u003e This gasket fits Chrysler 3.7L 224 CID 4-cylinder inboard engines rated at 170 HP (1985-1986) and 180 HP (1987).\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes 18-0956-1 work with both aluminum and cast iron exhaust manifolds?\u003c\/strong\u003e Yes, depending on the specific engine build. On the 170 HP 1985-1986 engines, 18-0956-1 is used with either the aluminum manifold gasket set or the cast iron manifold gasket set, and it is also used on the 180 HP 1987 aluminum manifold application.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow do I know if my engine's serial number is covered?\u003c\/strong\u003e For the 170 HP 1985-1986 application, 18-0956-1 covers serial numbers 6916779 through B434940. For the 180 HP 1987 application, it covers serial numbers B436391 through B775248.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color is the 18-0956-1 gasket?\u003c\/strong\u003e The Sierra 18-0956-1 exhaust manifold gasket is white and round in shape.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many gaskets come in a package of 18-0956-1?\u003c\/strong\u003e Each package of the 18-0956-1 gasket contains one gasket unit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-0956-1 exhaust manifold gasket weigh?\u003c\/strong\u003e The 18-0956-1 gasket weighs 0.2 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs 18-0956-1 used alongside other gaskets in the same repair?\u003c\/strong\u003e Yes. For the 170 HP 1985-1986 aluminum manifold application, 18-0956-1 is used together with 18-1937 and 18-0881-1. For the cast iron manifold application on the same engine, it is used together with 18-0113-1.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this gasket genuine Sierra or aftermarket?\u003c\/strong\u003e The 18-0956-1 exhaust manifold gasket is a genuine Sierra part, identified by Sierra part number 18-0956-1.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen should I replace the exhaust manifold gasket?\u003c\/strong\u003e The 18-0956-1 gasket should be replaced any time the exhaust manifold is removed from a 3.7L 224 CID Chrysler inboard engine, since reinstalling a used gasket increases the risk of leaks.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes 18-0956-1 have a UPC I can use to verify the part?\u003c\/strong\u003e Yes, the Sierra 18-0956-1 exhaust manifold gasket carries UPC 808282365813.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988086468827,"sku":"SIE-18-0956-1","price":26.62,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-0956_lg__01824.1558119064.500.750.jpg?v=1785188012"},{"product_id":"mercruiser-manifold-end-cap-gasket-27-73814-2-pack-fits-mcm-mie-120-140-165-470-898-228-260","title":"Sierra Manifold End Cap Gasket 18-0928-1-9, Replaces 27-73814, Fits MerCruiser MCM\/MIE 120-260 (Pack of 2)","description":"\u003cp\u003eThe Sierra Manifold End Cap Gasket, part number 18-0928-1-9, seals the end cap on MerCruiser exhaust manifolds to prevent exhaust and coolant leaks at the manifold-to-end-cap joint. It is made of graphite-infused stainless steel for superior compressibility, letting it conform to mating surfaces and hold a reliable seal under the heat and vibration of engine operation. Each gasket is sold in a pack of two so both end caps on an engine can be replaced together during a manifold service or gasket refresh. This gasket is a direct replacement for OEM part 27-73814, giving MerCruiser owners a straightforward way to source the correct seal without hunting down the original part. It fits MerCruiser MCM\/MIE 120 (2.5L), 140 (3.0L), and 165 inline 6-cylinder engines, as well as MCM\/MIE 470, 898, 228, and 260 engines. Backed by Sierra's industry-leading warranty, it is a precision-made component intended for straightforward removal-and-replace installation during routine exhaust manifold maintenance.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-0928-1-9\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity:\u003c\/strong\u003e Pack of 2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Graphite-infused stainless steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.04 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eItem Dimensions:\u003c\/strong\u003e 0.39 x 0.39 x 0.39 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Dimensions:\u003c\/strong\u003e 7.01 x 6.97 x 0.31 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282369187\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Mercruiser exhaust manifolds\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMerCruiser MCM\/MIE 120 (2.5L)\u003c\/li\u003e\n\u003cli\u003eMerCruiser MCM\/MIE 140 (3.0L)\u003c\/li\u003e\n\u003cli\u003eMerCruiser MCM\/MIE 165 (inline 6-cylinder)\u003c\/li\u003e\n\u003cli\u003eMerCruiser MCM\/MIE 470\u003c\/li\u003e\n\u003cli\u003eMerCruiser MCM\/MIE 898\u003c\/li\u003e\n\u003cli\u003eMerCruiser MCM\/MIE 228\u003c\/li\u003e\n\u003cli\u003eMerCruiser MCM\/MIE 260\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e27-73814\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-0928-1-9 gasket fit?\u003c\/strong\u003e This gasket fits MerCruiser MCM\/MIE 120 (2.5L), 140 (3.0L), and 165 inline 6-cylinder engines, along with MCM\/MIE 470, 898, 228, and 260 engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part number does 18-0928-1-9 replace?\u003c\/strong\u003e It is a direct replacement for OEM part 27-73814, the manifold end cap gasket used on the fitted MerCruiser engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many gaskets come in a package?\u003c\/strong\u003e Sierra 18-0928-1-9 is sold in a pack of two gaskets, enough to service both end caps on a single engine.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is the Sierra manifold end cap gasket made from?\u003c\/strong\u003e The gasket is made of graphite-infused stainless steel, chosen for its compressibility and ability to hold a seal under engine heat and vibration.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does this gasket weigh?\u003c\/strong\u003e The Sierra 18-0928-1-9 manifold end cap gasket weighs 0.04 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of the gasket?\u003c\/strong\u003e Each individual gasket measures 0.39 x 0.39 x 0.39 inches, and the retail package measures 7.01 x 6.97 x 0.31 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this a genuine Sierra part or an aftermarket copy?\u003c\/strong\u003e 18-0928-1-9 is a genuine Sierra part, backed by Sierra's industry-leading warranty.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhere is this gasket used on the engine?\u003c\/strong\u003e It seals the joint between the exhaust manifold and the manifold end cap on the fitted MerCruiser engines, preventing exhaust and coolant leaks at that connection.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I install this gasket myself?\u003c\/strong\u003e Yes, the Sierra 18-0928-1-9 manifold end cap gasket is designed as a direct removal-and-replace part for routine exhaust manifold service.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included when I order this part?\u003c\/strong\u003e Ordering 18-0928-1-9 gets you two manifold end cap gaskets, matching the OEM 27-73814 specification.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988086501595,"sku":"SIE-18-0928-1-9","price":17.69,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-0928_lg_1__91574.1670333906.500.750.jpg?v=1785188871"},{"product_id":"sierra-18-0954-exhaust-elbow-gasket-replaces-mercruiser-27-92720-fits-mercruiser-mie-470","title":"Sierra 18-0954 Exhaust Elbow Gasket, Replaces 27-73814, Fits MerCruiser MIE 470, Pack of 2","description":"\u003cp\u003eThe Sierra 18-0954 Exhaust Elbow Gasket seals the connection between the exhaust elbow and the engine exhaust manifold on applicable MerCruiser stern drive and inboard engines, preventing exhaust leaks and water intrusion at this joint. It is sold as a package of 2 gaskets, so both sides or a spare replacement are covered in a single purchase. The gasket is rectangular in shape and grey in color, cut to the flange dimensions of the OEM exhaust elbow gasket it replaces. Installation is a straightforward flat-gasket swap during exhaust elbow removal or servicing, and it is commonly replaced any time the exhaust elbow is pulled for inspection or when an exhaust leak or corrosion is found at the elbow-to-manifold joint. This gasket is designed to meet or exceed the specification of the original equipment part it replaces, giving a reliable seal without sourcing the original manufacturer part. It directly replaces OEM part numbers 27-73814, 27-738141, and 27-807218, and fits the MerCruiser MIE 470 engine application. Always match the gasket to your exhaust elbow's mounting pattern before ordering.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-0954\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Exhaust Elbow Gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity:\u003c\/strong\u003e 2 (sold as a pair)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShape:\u003c\/strong\u003e Rectangular\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e Grey\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.04 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999751980\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e 27-73814, 27-738141, 27-807218\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment:\u003c\/strong\u003e MerCruiser MIE 470\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eMerCruiser MIE 470\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e27-73814\u003c\/li\u003e\n\u003cli\u003e27-738141\u003c\/li\u003e\n\u003cli\u003e27-807218\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-0954 gasket fit?\u003c\/strong\u003e It fits the MerCruiser MIE 470 engine application, sealing the joint between the exhaust elbow and the exhaust manifold.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many gaskets come in a pack?\u003c\/strong\u003e The Sierra 18-0954 is sold as a package of 2 exhaust elbow gaskets.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-0954 a direct replacement for OEM 27-73814?\u003c\/strong\u003e Yes, the 18-0954 gasket directly replaces OEM part numbers 27-73814, 27-738141, and 27-807218.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the OEM cross-reference numbers for this gasket?\u003c\/strong\u003e OEM cross-reference numbers 27-73814, 27-738141, and 27-807218 all correspond to the Sierra 18-0954 exhaust elbow gasket.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color and shape is the 18-0954 gasket?\u003c\/strong\u003e It is a grey, rectangular gasket sized to match the OEM exhaust elbow flange it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-0954 gasket weigh?\u003c\/strong\u003e The gasket weighs 0.04 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen should I replace this exhaust elbow gasket?\u003c\/strong\u003e Replace the 18-0954 gasket whenever the exhaust elbow is removed for service or when a leak or corrosion is found at the elbow-to-manifold joint.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs installation of the 18-0954 gasket straightforward?\u003c\/strong\u003e Yes, it is a flat gasket that installs during normal removal and reinstallation of the exhaust elbow, requiring no special tools beyond what the elbow service itself calls for.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the Sierra 18-0954 meet OEM standards?\u003c\/strong\u003e The Sierra 18-0954 gasket is designed to meet or exceed the specification of the original equipment part it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included when I order the 18-0954?\u003c\/strong\u003e Ordering the Sierra 18-0954 gets you 2 exhaust elbow gaskets, enough for a complete gasket swap or a spare.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-0954 gasket?\u003c\/strong\u003e The UPC for the Sierra 18-0954 Exhaust Elbow Gasket is 030999751980.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988086534363,"sku":"SIE-18-0954","price":3.88,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-0954_lg__71665.1703251148.500.750.jpg?v=1785188129"},{"product_id":"exhaust-elbow-gasket-for-volvo-penta-replaces-909786-3850496-package-of-2-mpn-118-0943-2-9","title":"Sierra Exhaust Elbow Gasket 18-0943-2-9, Replaces 908013, Volvo Penta Exhaust Manifold, Pack of 2","description":"\u003cp\u003eThe Sierra 18-0943-2-9 is an exhaust elbow gasket built for Volvo Penta exhaust manifold applications. It seals the mating surface between the exhaust elbow and the exhaust manifold, a joint that is exposed to constant heat and moisture and is a common source of leaks and corrosion as gaskets age. Replacing this gasket whenever the exhaust elbow is removed helps maintain a tight, reliable seal and prevents exhaust or water leaks at the connection.\u003c\/p\u003e\u003cp\u003eThis gasket is sold as a package of 2, so a single purchase covers a full gasket replacement without needing a second order. It cross-references directly to OEM part numbers 908013 and 3850495, making it a straightforward equivalent for boat owners and technicians who already know those numbers from service records or OEM parts diagrams. Note that this is a distinct part from the Sierra manifold end cap gasket (18-2850-1 \/ 18-2850-9), which is a separate product for a different location on the exhaust system, so be sure to order 18-0943-2-9 specifically for the exhaust elbow joint.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-0943-2-9\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Exhaust Elbow Gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity:\u003c\/strong\u003e 2 gaskets\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross-Reference:\u003c\/strong\u003e 908013, 3850495\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Volvo Penta exhaust manifolds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.07 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282369194\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eVolvo Penta exhaust manifold applications\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e908013\u003c\/li\u003e\n\u003cli\u003e3850495\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-0943-2-9 exhaust elbow gasket replace?\u003c\/strong\u003e It cross-references directly to OEM part numbers 908013 and 3850495, so either of those numbers can be used to confirm you need the 18-0943-2-9 gasket.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many gaskets come in one package?\u003c\/strong\u003e Each package of the Sierra 18-0943-2-9 exhaust elbow gasket contains 2 gaskets.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-0943-2-9 gasket a genuine Sierra part or an aftermarket copy?\u003c\/strong\u003e It is produced and sold under the Sierra part number 18-0943-2-9, the manufacturer's own designation for this exhaust elbow gasket.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat system is this gasket designed for?\u003c\/strong\u003e This gasket is designed for Volvo Penta exhaust manifold applications, sealing the exhaust elbow to manifold connection.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the gasket package weigh?\u003c\/strong\u003e The Sierra 18-0943-2-9 exhaust elbow gasket package weighs 0.07 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs 18-0943-2-9 the same part as the manifold end cap gasket?\u003c\/strong\u003e No. The manifold end cap gasket is a separate Sierra product (18-2850-1 \/ 18-2850-9); 18-0943-2-9 is specifically the exhaust elbow gasket, so make sure you order the correct number for the location you are servicing.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for this product?\u003c\/strong\u003e The UPC for the Sierra 18-0943-2-9 exhaust elbow gasket package is 808282369194.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen should I replace this gasket?\u003c\/strong\u003e The exhaust elbow gasket should be replaced any time the exhaust elbow is removed from the manifold, since reusing an old gasket at this joint risks an exhaust or water leak.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes one package provide enough gaskets for a full elbow replacement?\u003c\/strong\u003e The 18-0943-2-9 package includes 2 gaskets, which is the quantity Sierra packages together for this exhaust elbow application.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988086698203,"sku":"SIE-18-0943-2-9","price":15.87,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/18-0943-1-9__70829.1722501850.500.750.jpg?v=1785329158"},{"product_id":"exhaust-bellows-for-volvo-penta-sx-a-dps-a-drives-replaces-oem-3888916-sierra-18-1076","title":"Sierra 18-1076 Exhaust Bellows for Volvo Penta Exhaust Systems, Replaces 388896","description":"\u003cp\u003eThe Sierra 18-1076 Exhaust Bellows is a replacement exhaust bellows built for Volvo Penta exhaust systems. It is designed as a direct replacement for Volvo Penta part number 388896, giving boat owners a straightforward way to restore the exhaust system without sourcing the original Volvo Penta component. The bellows is finished in white and ships as a single unit measuring 8 x 6 x 5 inches, with a product weight of 1.24 pounds, making it easy to handle and install in place of the original part.\u003c\/p\u003e\u003cp\u003eExhaust bellows connect sections of a marine exhaust system and flex to absorb movement and vibration while maintaining a seal. Because this bellows is manufactured to match the fit of Volvo Penta part 388896, it is intended to install using the same mounting points and configuration as the original component it replaces. This makes the Sierra 18-1076 a practical option for maintenance and repair work on Volvo Penta exhaust systems where the factory bellows has worn out, cracked, or failed.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-1076\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Exhaust Bellows\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment:\u003c\/strong\u003e Volvo Penta exhaust systems\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReplaces (OEM):\u003c\/strong\u003e Volvo Penta 388896\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 8 x 6 x 5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 1.24 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e White\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Items:\u003c\/strong\u003e 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282315993\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eVolvo Penta exhaust systems\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eVolvo Penta 388896\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-1076 exhaust bellows replace?\u003c\/strong\u003e The Sierra 18-1076 is a direct replacement for Volvo Penta part number 388896.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color is the Sierra 18-1076 exhaust bellows?\u003c\/strong\u003e It is white, matching the finish of the original Volvo Penta 388896 bellows it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of the Sierra 18-1076 bellows?\u003c\/strong\u003e The Sierra 18-1076 exhaust bellows measures 8 x 6 x 5 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-1076 exhaust bellows weigh?\u003c\/strong\u003e It weighs 1.24 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the Sierra 18-1076 exhaust bellows used for?\u003c\/strong\u003e It is used in Volvo Penta exhaust systems, where it connects exhaust sections and flexes to accommodate movement while maintaining a seal.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-1076 a genuine Volvo Penta part or an aftermarket replacement?\u003c\/strong\u003e The 18-1076 is a Sierra-brand aftermarket replacement made to replace Volvo Penta part number 388896, not an original Volvo Penta part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many bellows come in one Sierra 18-1076 package?\u003c\/strong\u003e Each package contains one Sierra 18-1076 exhaust bellows.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the Sierra 18-1076 install in place of Volvo Penta part 388896?\u003c\/strong\u003e Yes, the Sierra 18-1076 is designed as a direct replacement for Volvo Penta 388896, so it fits using the same mounting configuration as the original part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-1076 exhaust bellows?\u003c\/strong\u003e The UPC for the Sierra 18-1076 exhaust bellows is 808282315993.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow is the Sierra 18-1076 different from the OEM Volvo Penta 388896 bellows?\u003c\/strong\u003e The Sierra 18-1076 is a functionally interchangeable aftermarket equivalent to Volvo Penta part 388896, sold under the Sierra marine parts brand.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988086763739,"sku":"SIE-18-1076","price":43.91,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-1076__60778.1558184553.500.750.jpg?v=1785188073"},{"product_id":"sierra-18-1074-exhaust-bellows-for-volvo-penta-omc-replaces-3850426-767724-mallory-9-72711","title":"Sierra Exhaust Bellows 18-1074, Replaces 3850426, Fits Cone Clutch Models 1994-up","description":"\u003cp\u003eThe Sierra 18-1074 Exhaust Bellows is a direct-fit replacement bellows built for cone clutch models (1994-up) that do not use an exhaust boot. It connects the exhaust housing to the drive unit, sealing the exhaust path while accommodating the movement of the drive assembly during operation. The bellows measures 2 5\/8 inches inside diameter by 3 inches outside diameter by 7.5 inches in length, matching the dimensions of the original equipment part it replaces, part number 3850426.\u003c\/p\u003e\u003cp\u003eInstalling a worn or cracked exhaust bellows helps prevent water intrusion and exhaust leaks that can affect drive performance. The bellows is finished in white and ships as a single unit, ready to install as a one-for-one swap for the original part on applicable cone clutch models.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-1074\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Exhaust Bellows\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInside Diameter:\u003c\/strong\u003e 2 5\/8 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutside Diameter:\u003c\/strong\u003e 3 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e 7.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e White\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.8 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282166922\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment:\u003c\/strong\u003e All cone clutch models (1994-up), not using exhaust boot\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReplaces (OEM):\u003c\/strong\u003e 3850426\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eAll cone clutch models (1994-up) not using exhaust boot\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e3850426\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-1074 exhaust bellows fit?\u003c\/strong\u003e The Sierra 18-1074 exhaust bellows fits all cone clutch models (1994-up) that do not use an exhaust boot.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part number does 18-1074 replace?\u003c\/strong\u003e Part number 18-1074 replaces OEM number 3850426.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of the 18-1074 exhaust bellows?\u003c\/strong\u003e It measures 2 5\/8 inches inside diameter by 3 inches outside diameter by 7.5 inches in length.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-1074 exhaust bellows weigh?\u003c\/strong\u003e The Sierra 18-1074 exhaust bellows weighs 0.8 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color is the Sierra 18-1074 bellows?\u003c\/strong\u003e It is white.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this bellows compatible with models that use an exhaust boot?\u003c\/strong\u003e No. The 18-1074 exhaust bellows is designed for cone clutch models (1994-up) that do not use an exhaust boot; it is not intended for setups that require a boot.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many bellows come in a package of the 18-1074?\u003c\/strong\u003e The 18-1074 exhaust bellows is packaged as a single unit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-1074 exhaust bellows?\u003c\/strong\u003e The UPC for this part is 808282166922.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-1074 match OEM specifications?\u003c\/strong\u003e Yes, the 18-1074 exhaust bellows is manufactured to the same dimensions as OEM part 3850426, the part it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the purpose of an exhaust bellows like the 18-1074?\u003c\/strong\u003e An exhaust bellows such as the 18-1074 seals the connection between the exhaust housing and drive unit, accommodating movement while containing exhaust flow on cone clutch models (1994-up) without an exhaust boot.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988086829275,"sku":"SIE-18-1074","price":39.21,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-1074_lg__22570.1558119301.500.750.jpg?v=1785188867"},{"product_id":"sierra-18-1842-v6-dry-joint-exhaust-manifold-replaces-mercury-864612t01-fits-4-3l-262cid-alpha-bravo-2002-and-newer","title":"Sierra 18-1842 V6 Dry Joint Exhaust Manifold - Replaces 27-864850A02, 27-864547A1","description":"\u003cp\u003eThe Sierra 18-1842 is a V6 dry joint exhaust manifold built for marine engines that use the dry joint manifold-and-riser exhaust configuration. Unlike a wet-joint design, the dry joint manifold moves water from the manifold to the riser externally rather than through an internal water jacket seal, which essentially eliminates the possibility of water entering the cylinders if a gasket fails. This makes it a common choice when reliability against gasket failure is a priority.\u003c\/p\u003e\u003cp\u003eThe 18-1842 is used together with the 18-1843 manifold and 18-1845 riser as a matched dry joint set, and it can also be used with the OE riser. It fits 4.3L, 5.0L, 5.7L, and 6.2L engines that utilize the dry joint manifold and riser system. The manifold has a white finish and weighs 33 pounds.\u003c\/p\u003e\u003cp\u003eIt directly replaces OEM manifold numbers 27-864850A02 and 27-864547A1, allowing it to be ordered as a drop-in replacement for engines originally fitted with those parts.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-1842\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e V6 Dry Joint Exhaust Manifold\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits:\u003c\/strong\u003e 4.3L, 5.0L, 5.7L, 6.2L engines utilizing the Dry Joint Manifold and Riser system\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUsed With:\u003c\/strong\u003e 18-1843 Manifold, 18-1845 Riser\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor\/Finish:\u003c\/strong\u003e White\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 33 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross-Reference:\u003c\/strong\u003e 27-864850A02, 27-864547A1\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eFits 4.3L, 5.0L, 5.7L, and 6.2L engines that utilize the dry joint manifold and riser exhaust system. Used with the 18-1843 manifold and 18-1845 riser.\u003c\/p\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e27-864850A02\u003c\/li\u003e\n\u003cli\u003e27-864547A1\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-1842 exhaust manifold fit?\u003c\/strong\u003e The Sierra 18-1842 fits 4.3L, 5.0L, 5.7L, and 6.2L engines that use the dry joint manifold and riser exhaust configuration.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part numbers does the 18-1842 replace?\u003c\/strong\u003e It replaces OEM manifold numbers 27-864850A02 and 27-864547A1.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-1842 the same as OEM part 27-864850A02?\u003c\/strong\u003e Yes, the Sierra 18-1842 is a direct replacement for OEM number 27-864850A02 as well as 27-864547A1.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is a dry joint exhaust manifold?\u003c\/strong\u003e A dry joint exhaust manifold, like the Sierra 18-1842, transfers water from the manifold to the riser externally instead of through an internal water jacket seal, which essentially eliminates the possibility of water entering the cylinders if a gasket fails.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-1842 manifold weigh?\u003c\/strong\u003e The Sierra 18-1842 exhaust manifold weighs 33 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color is the 18-1842 manifold?\u003c\/strong\u003e It has a white finish.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan the 18-1842 be used with the OE riser?\u003c\/strong\u003e Yes, the 18-1842 manifold can be used with the OE riser in addition to the Sierra 18-1845 riser.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat other parts are needed with the 18-1842?\u003c\/strong\u003e The 18-1842 is designed for use as part of a matched dry joint set alongside the 18-1843 manifold and 18-1845 riser.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-1842 require a specific gasket?\u003c\/strong\u003e The 18-1842 dry joint manifold is designed to work with the dry joint manifold and riser gasket system used in this exhaust configuration.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy choose a dry joint manifold over a wet joint design?\u003c\/strong\u003e The dry joint design used in the 18-1842 essentially eliminates the possibility of water entering the cylinders if there is a gasket failure, since water is transferred externally from the manifold to the riser rather than through an internal seal.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988089024731,"sku":"SIE-18-1842","price":409.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/Sierra-18-1842-V6-Dry-Joint-Exhaust-Manifold__95934.1727703225.500.750.jpg?v=1785189034"},{"product_id":"sierra-18-1848-exhaust-manifold-replaces-omc-3852338-fits-4-3l-v-6-omc-sterndrive-cobra","title":"Sierra 18-1848 Exhaust Manifold for GM and Ford Center Rise Engines","description":"\u003cp\u003eThe Sierra 18-1848 is an exhaust manifold built to fit many GM and Ford engines that use a center rise manifold configuration. It is a direct-fit replacement designed to route exhaust gases away from the engine and into the riser and exhaust hose system, maintaining proper cooling water flow and exhaust flow through the powerhead.\u003c\/p\u003e\u003cp\u003eThis manifold is designed to work as part of a complete exhaust system. It pairs with riser gasket 18-0943-2 to seal the connection between the manifold and riser, and with mounting kit 18-8507 for a proper installation. It also cross-references to alternate manifold part number 18-1986-1, so buyers researching either number can confirm they are looking at compatible hardware for the same engine family.\u003c\/p\u003e\u003cp\u003eBecause it fits many GM and Ford applications using the center rise manifold layout, the 18-1848 is a common replacement choice when an original manifold has cracked, corroded, or otherwise failed. At 32 pounds, it is built to the same general weight and duty class as the OEM hardware it replaces.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-1848\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Exhaust Manifold\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment:\u003c\/strong\u003e Fits many GM and Ford center rise manifolds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompanion Riser Gasket:\u003c\/strong\u003e 18-0943-2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompanion Mounting Kit:\u003c\/strong\u003e 18-8507\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAlternate Manifold Reference:\u003c\/strong\u003e 18-1986-1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 32 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282266431\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eFits many GM and Ford engines with a center rise manifold configuration\u003c\/li\u003e\n\u003cli\u003eUse with riser gasket 18-0943-2 and mounting kit 18-8507 for a complete installation\u003c\/li\u003e\n\u003cli\u003eAlternate manifold reference: 18-1986-1\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-1848 exhaust manifold fit?\u003c\/strong\u003e The Sierra 18-1848 fits many GM and Ford engines that use a center rise manifold configuration.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-1848 come with a riser gasket?\u003c\/strong\u003e No, the manifold itself does not include the riser gasket. It is designed to be used with riser gasket 18-0943-2, which should be ordered separately for a proper seal.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs a mounting kit needed to install the 18-1848 manifold?\u003c\/strong\u003e Yes, mounting kit 18-8507 is the companion mounting kit designed for use with the Sierra 18-1848 manifold.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-1848 manifold weigh?\u003c\/strong\u003e It weighs 32 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs 18-1986-1 the same as the 18-1848?\u003c\/strong\u003e 18-1986-1 is listed as an alternate manifold reference alongside the 18-1848, so the two are associated part numbers for compatible manifold hardware rather than identical part numbers.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this a direct OEM replacement manifold?\u003c\/strong\u003e The Sierra 18-1848 is designed to fit many GM and Ford engines that use a center rise manifold layout, making it a direct-fit replacement manifold for those applications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-1848?\u003c\/strong\u003e The UPC for this manifold is 808282266431.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is the 18-1848 exhaust manifold made from?\u003c\/strong\u003e Material is not specified for the Sierra 18-1848 in current product data.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I use the 18-1848 with any riser?\u003c\/strong\u003e The 18-1848 manifold is designed to be used with riser gasket 18-0943-2; using a mismatched gasket can affect the seal between the manifold and riser.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the Sierra 18-1848 fit both GM and Ford engines?\u003c\/strong\u003e Yes, the 18-1848 is designed to fit many GM and Ford engines that share the center rise manifold configuration.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988089057499,"sku":"SIE-18-1848","price":353.63,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-1848_lg__21231.1771260090.500.750.jpg?v=1785329144"},{"product_id":"sierra-18-1843-dry-joint-exhaust-manifold-for-mercruiser-5-0l-5-7l-6-2l-2002-newer-replaces-865735a02","title":"Sierra 18-1843 Dry Joint Exhaust Manifold, Replaces 27-864850A02, Fits 4.3L 5.0L 5.7L 6.2L","description":"\u003cp\u003eThe Sierra 18-1843 is a dry joint style exhaust manifold built for 4.3L, 5.0L, and 5.7L \/ 6.2L marine engines that use the dry joint manifold and riser exhaust system. Unlike wet joint manifolds, the dry joint design keeps the exhaust manifold and riser joint isolated from raw cooling water, which helps reduce the corrosion and joint failure common to older wet joint setups. This manifold is engineered to meet or exceed the performance of the original equipment part it replaces, and it is built to hold up to the heat cycling, vibration, and saltwater or freshwater exposure typical of inboard and sterndrive engine compartments.\u003c\/p\u003e\u003cp\u003eThe 18-1843 is designed to be used together with the 18-1842 manifold and the 18-1845 riser as part of a complete dry joint exhaust manifold and riser system, so buyers replacing one component of this system can order the matching parts with confidence that they are built to work together. This manifold is a direct fit replacement for the OEM part numbers listed below, making it a straightforward swap for engines that originally used those manifolds.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-1843\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Dry Joint Exhaust Manifold\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStyle:\u003c\/strong\u003e Dry Joint\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine Fitment:\u003c\/strong\u003e 4.3L, 5.0L, 5.7L, 6.2L (dry joint manifold and riser system)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUsed With:\u003c\/strong\u003e 18-1843 and 18-1842 manifolds, 18-1845 riser\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e 27-864850A02, 27-864547A1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 49 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282359423\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e4.3L, 5.0L, 5.7L, 6.2L engines using the dry joint exhaust manifold and riser system\u003c\/li\u003e\n\u003cli\u003eUsed with 18-1843 and 18-1842 manifolds and 18-1845 riser\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e27-864850A02\u003c\/li\u003e\n\u003cli\u003e27-864547A1\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-1843 exhaust manifold fit?\u003c\/strong\u003e The Sierra 18-1843 fits 4.3L, 5.0L, 5.7L, and 6.2L marine engines that use the dry joint exhaust manifold and riser system.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-1843 a direct OEM replacement?\u003c\/strong\u003e Yes, the 18-1843 is a direct replacement for OEM manifolds 27-864850A02 and 27-864547A1, so it installs in place of the original part without modification.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is a dry joint exhaust manifold, and why does it matter?\u003c\/strong\u003e A dry joint exhaust manifold, like the Sierra 18-1843, keeps the manifold-to-riser joint separated from raw cooling water, which reduces the corrosion and joint failure that affect older wet joint exhaust designs.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-1843 need to be ordered with any other parts?\u003c\/strong\u003e The 18-1843 manifold is designed to be used together with the 18-1842 manifold and the 18-1845 riser as part of one dry joint exhaust system, so matching those parts is recommended for a complete rebuild.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-1843 weigh?\u003c\/strong\u003e The Sierra 18-1843 exhaust manifold weighs 49 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part numbers does the 18-1843 cross reference to?\u003c\/strong\u003e The 18-1843 crosses over to OEM numbers 27-864850A02 and 27-864547A1.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-1843 covered by a warranty?\u003c\/strong\u003e Sierra parts, including the 18-1843 manifold, are backed by Sierra's customer satisfaction warranty covering defects in workmanship and materials.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan the 18-1843 be used on both 5.0L and 5.7L engines?\u003c\/strong\u003e Yes, the 18-1843 is built to fit 4.3L, 5.0L, 5.7L, and 6.2L engines using the dry joint manifold and riser configuration.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-1843 replace a wet joint manifold?\u003c\/strong\u003e No, the 18-1843 is specifically a dry joint style manifold and is intended for engines already set up with a dry joint manifold and riser exhaust system, not a wet joint system.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat comes with the Sierra 18-1843?\u003c\/strong\u003e The Sierra 18-1843 is supplied as a single dry joint exhaust manifold; the matching 18-1842 manifold and 18-1845 riser are separate parts sold individually.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988089090267,"sku":"SIE-18-1843","price":545.74,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-1843__54393.1753461487.500.750.jpg?v=1785188130"},{"product_id":"sierra-18-1845-dry-joint-exhaust-elbow-replaces-mercruiser-864591t02-fits-v6-v8-305-350-377-2004-up-and-4-3l-alpha-bravo-dry-joint","title":"Sierra 18-1845 Dry-Joint Exhaust Riser, Replaces 27-864850A02 \u0026 27-864547A1, Fits 4.3L\/5.0L\/5.7L\/6.2L Engines","description":"\u003cp\u003eThe Sierra 18-1845 is a dry-joint exhaust riser (elbow) built for marine engines that use the dry-joint manifold and riser exhaust system. It routes exhaust and cooling water away from the exhaust manifold and is designed as a direct replacement for the original equipment riser on applicable 4.3L, 5.0L, 5.7L, and 6.2L engines. The dry-joint design keeps the exhaust and cooling water paths separated at the manifold-to-riser connection until they combine further along the system, which is the defining feature of this riser style versus a wet-joint design.\u003c\/p\u003e\u003cp\u003eThis riser is intended to be used together with the matching 18-1843 or 18-1842 exhaust manifold and the 18-1845 riser as a complete dry-joint set, so the components seal and fit correctly. It is a round, white-finished component sized to bolt directly in place of the original riser it replaces. Because it is a direct-fit replacement part, no modification to the exhaust system is required during installation.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-1845\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Dry-Joint Exhaust Riser\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e White\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShape:\u003c\/strong\u003e Round\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 27.2 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282359430\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine Fitment:\u003c\/strong\u003e 4.3L, 5.0L, 5.7L, 6.2L using the Dry Joint Manifold and Riser\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUsed With:\u003c\/strong\u003e 18-1843 and 18-1842 exhaust manifolds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e 27-864850A02, 27-864547A1\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eFits 4.3L, 5.0L, 5.7L, and 6.2L engines utilizing the Dry Joint Manifold and Riser exhaust system\u003c\/li\u003e\n\u003cli\u003eUsed with 18-1843 or 18-1842 exhaust manifolds and the 18-1845 riser as a matched set\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e27-864850A02\u003c\/li\u003e\n\u003cli\u003e27-864547A1\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-1845 exhaust riser fit?\u003c\/strong\u003e The Sierra 18-1845 fits 4.3L, 5.0L, 5.7L, and 6.2L engines that use the Dry Joint Manifold and Riser exhaust system.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part numbers does the 18-1845 replace?\u003c\/strong\u003e The 18-1845 riser replaces OEM numbers 27-864850A02 and 27-864547A1.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-1845 a wet-joint or dry-joint riser?\u003c\/strong\u003e It is a dry-joint riser, meaning the exhaust and cooling water paths stay separated at the manifold-to-riser connection, unlike a wet-joint design.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-1845 exhaust riser weigh?\u003c\/strong\u003e The Sierra 18-1845 weighs 27.2 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color and shape is the 18-1845 riser?\u003c\/strong\u003e The 18-1845 has a white finish and a round shape.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat manifold should I pair with the 18-1845 riser?\u003c\/strong\u003e The 18-1845 riser is designed to be used with the 18-1843 or 18-1842 exhaust manifold as a matched dry-joint set.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan the 18-1845 be installed as a direct replacement without modification?\u003c\/strong\u003e Yes, the Sierra 18-1845 is built as a direct-fit replacement riser for the applicable dry-joint exhaust system, requiring no modification to install.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-1845 come as a single riser or a full manifold kit?\u003c\/strong\u003e The 18-1845 is the riser component itself; it is used together with a separate 18-1843 or 18-1842 manifold to complete the dry-joint exhaust system.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-1845 the same part regardless of engine size?\u003c\/strong\u003e One 18-1845 part number covers 4.3L, 5.0L, 5.7L, and 6.2L engines that use the Dry Joint Manifold and Riser system, since it is not liter-specific in design.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-1845 riser?\u003c\/strong\u003e The UPC for the Sierra 18-1845 exhaust riser is 808282359430.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988089123035,"sku":"SIE-18-1845","price":407.35,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-1845__69741.1727706272.500.750.jpg?v=1785188574"},{"product_id":"sierra-18-1908k-3-inch-manifold-riser-spacer-kit-replaces-mercruiser-807476a6-93320a5-for-18-1957-2-manifold","title":"Sierra 18-1908K Manifold Riser Spacer Kit, Includes Elbow Gaskets, for Use with Riser 18-1976-2","description":"\u003cp\u003eThe Sierra 18-1908K Manifold Riser Spacer Kit is a complete exhaust manifold spacer package built for I\/O engine cooling systems that use riser 18-1976-2. The kit centers on the 18-1908 manifold spacer and includes the gaskets needed to seal the connection, so the elbow gasket hunt is eliminated at install time. Each kit ships with one 18-2849-1 elbow gasket and one 18-0897 elbow gasket, matched specifically for use with the 18-1908 spacer and 18-1976-2 riser combination.\u003c\/p\u003e\u003cp\u003eConstruction is metal, matching the durability expected of an exhaust manifold component that sees sustained heat and marine moisture exposure. The kit is packaged as a single unit count, ready to install without sourcing separate gaskets or hardware. It is intended as a direct fit for the riser and spacer combination it is designed for, simplifying maintenance on the exhaust cooling path of applicable I\/O setups.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-1908K\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Manifold Riser Spacer Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Metal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded Components:\u003c\/strong\u003e Manifold spacer 18-1908, (1) elbow gasket 18-2849-1, (1) elbow gasket 18-0897\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUse With:\u003c\/strong\u003e Riser 18-1976-2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit Count:\u003c\/strong\u003e 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFit Type:\u003c\/strong\u003e Universal Fit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 16.5 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282159399\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eDesigned for use with riser 18-1976-2 on applicable I\/O exhaust cooling systems.\u003c\/p\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cp\u003eNo OEM cross-reference numbers are specified for this kit.\u003c\/p\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is included in the Sierra 18-1908K kit?\u003c\/strong\u003e The 18-1908K kit includes the 18-1908 manifold spacer along with one 18-2849-1 elbow gasket and one 18-0897 elbow gasket, giving you the spacer and both gaskets needed for the installation in a single package.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat riser does the 18-1908K manifold spacer kit work with?\u003c\/strong\u003e This kit is designed for use with riser 18-1976-2, so it pairs the 18-1908 spacer and its gaskets specifically for that riser.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-1908K a full gasket set or just the spacer?\u003c\/strong\u003e It is a complete kit, not just a bare spacer: the 18-1908 spacer ships together with the 18-2849-1 and 18-0897 elbow gaskets required to seal it in place.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is the Sierra 18-1908K spacer made from?\u003c\/strong\u003e The manifold spacer in the 18-1908K kit is made of metal, consistent with the durability needed for an exhaust manifold cooling component.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-1908K kit weigh?\u003c\/strong\u003e The Sierra 18-1908K Manifold Riser Spacer Kit weighs 16.5 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many units come in one 18-1908K package?\u003c\/strong\u003e Each 18-1908K package is a single unit count, containing one manifold spacer and the two elbow gaskets listed for that kit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAre there OEM cross-reference numbers for the 18-1908K kit?\u003c\/strong\u003e No OEM cross-reference or replacement numbers are specified for the 18-1908K kit itself; it is identified by its own part number, 18-1908K.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDo I need to buy separate gaskets for the 18-1908K spacer?\u003c\/strong\u003e No, separate gaskets are not needed: the 18-1908K kit already includes one 18-2849-1 elbow gasket and one 18-0897 elbow gasket alongside the manifold spacer.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-1908K kit?\u003c\/strong\u003e The Sierra 18-1908K Manifold Riser Spacer Kit carries UPC 808282159399.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-1908K compatible with other risers besides 18-1976-2?\u003c\/strong\u003e The 18-1908K kit is specified for use with riser 18-1976-2; compatibility with other risers is not indicated.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat brand makes the 18-1908K manifold spacer kit?\u003c\/strong\u003e The 18-1908K Manifold Riser Spacer Kit is made by Sierra.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988089155803,"sku":"SIE-18-1908K","price":388.21,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/Untitled-1__39046.1753840675.500.750.jpg?v=1785188246"},{"product_id":"sierra-18-1909-1-exhaust-manifold-riser-elbow-with-hardware-replaces-omc-913784","title":"Sierra 18-1909-1 Manifold Elbow, Replaces OMC 913784, Use with 18-1986-1 Exhaust Manifold","description":"\u003cp\u003eThe Sierra 18-1909-1 Manifold Elbow is a direct-replacement exhaust manifold elbow built to connect to the 18-1986-1 exhaust manifold as part of a marine engine's exhaust system. The manifold elbow routes exhaust gases and cooling water away from the manifold, and this part is designed to work with the corresponding 18-8507 mounting kit for a complete, correctly sealed installation.\u003c\/p\u003e\u003cp\u003eAs an OEM cross-reference replacement, the 18-1909-1 is built to match the fit and function of the original OMC 913784 elbow, giving boat owners and marine technicians a straightforward way to source a replacement without hunting down a discontinued original part. Because exhaust manifold elbows are exposed to constant heat cycling and saltwater or freshwater cooling flow, replacing a corroded or cracked elbow with a properly matched part like the 18-1909-1 helps maintain a tight, leak-free exhaust and cooling path.\u003c\/p\u003e\u003cp\u003eThis part is sold as the manifold elbow itself; the separate 18-8507 mounting kit (which includes the gasket used with this elbow) should be ordered alongside it to complete the installation. Always confirm that your engine's exhaust manifold is the 18-1986-1 before ordering, since manifold elbows are matched to a specific manifold design.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-1909-1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Manifold Elbow\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 26.5 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUsed With Manifold:\u003c\/strong\u003e 18-1986-1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Mounting Kit:\u003c\/strong\u003e 18-8507\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e 913784, 3855270, 3850459\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282202859\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eUse with Manifold 18-1986-1\u003c\/li\u003e\n\u003cli\u003ePair with Mounting Kit 18-8507 for complete installation\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e913784\u003c\/li\u003e\n\u003cli\u003e3855270\u003c\/li\u003e\n\u003cli\u003e3850459\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat manifold does the Sierra 18-1909-1 fit?\u003c\/strong\u003e The Sierra 18-1909-1 manifold elbow is designed for use with the 18-1986-1 exhaust manifold, so confirm your engine uses that manifold before ordering.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-1909-1 a direct replacement for OMC 913784?\u003c\/strong\u003e Yes, the 18-1909-1 manifold elbow is built to replace OMC 913784, along with the additional cross-reference numbers 3855270 and 3850459.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-1909-1 manifold elbow weigh?\u003c\/strong\u003e The Sierra 18-1909-1 manifold elbow weighs 26.5 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDo I need to buy anything else to install the 18-1909-1?\u003c\/strong\u003e Yes, the 18-1909-1 should be paired with the 18-8507 mounting kit, which supplies the gasket and hardware needed for a complete installation.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-1909-1 include a gasket?\u003c\/strong\u003e No, the gasket used with the 18-1909-1 elbow is included in the separate 18-8507 mounting kit rather than with the elbow itself.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part numbers cross-reference to the Sierra 18-1909-1?\u003c\/strong\u003e The 18-1909-1 cross-references to OEM numbers 913784, 3855270, and 3850459.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy would I need to replace a manifold elbow like the 18-1909-1?\u003c\/strong\u003e Manifold elbows are exposed to constant heat and cooling water flow, so a cracked, corroded, or leaking elbow is typically replaced with a matched part such as the 18-1909-1 to restore a sealed exhaust and cooling path.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs Sierra 18-1909-1 an OEM part or an aftermarket replacement?\u003c\/strong\u003e The 18-1909-1 is a Sierra-branded aftermarket manifold elbow engineered as a replacement for the OEM 913784 elbow and its cross-referenced numbers.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I use the 18-1909-1 with a different exhaust manifold?\u003c\/strong\u003e The 18-1909-1 is specified for use with the 18-1986-1 exhaust manifold; fit with other manifold models is not confirmed.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included with the Sierra 18-1909-1?\u003c\/strong\u003e The 18-1909-1 listing covers the manifold elbow itself; the mounting kit (18-8507) with its gasket is a separate item needed to complete the installation.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988089188571,"sku":"SIE-18-1909-1","price":325.77,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/Untitled-1__43981.1771440787.500.750.jpg?v=1785188575"},{"product_id":"sierra-18-1908-manifold-riser-spacer-for-mercruiser-gm-v6-v8-229-454-cu-in-aluminum-exhaust-riser-spacer","title":"Sierra 18-1908 Manifold Riser Spacer, 3 Inch, OEM 933220A12, Fits Mercruiser Manifold 18-1953-2","description":"\u003cp\u003eThe Sierra 18-1908 is a 3 inch manifold riser spacer engineered to fit Mercruiser exhaust manifold 18-1953-2. It is built from aluminum and is primed and painted for added durability and corrosion protection, arriving ready to install out of the box. The spacer sits between the exhaust manifold and the riser elbow, and it is designed to be used with a specific mounting kit depending on which elbow and riser combination is installed: pair it with mounting kit 18-8554 when using riser 18-1970-2, or with mounting kit 18-8555 when using riser 18-1976-2. It carries the OEM cross-reference number 933220A12, so it is a direct equivalent for that original part.\u003c\/p\u003e\u003cp\u003eThis spacer is intended for engine setups that pair with manifold 18-1953-2, including Mercruiser GM Big Block V8 454 cid engines (Models 330, 340 \u0026amp; 74L), GM Small Block V8 305-350 cid engines (Models 200, 228, 230, 260 \u0026amp; 898), and GM V6 229 \u0026amp; 262 cid engines (Models 185 \u0026amp; 205). When sealing the elbow to this spacer, elbow gasket 18-0672 is the compatible closed-style gasket for this fitment. Note that mounting the elbow to the spacer requires its own separate mounting kit rather than reusing the elbow's original hardware.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-1908\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Manifold Riser Spacer\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e 933220A12\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpacer Height:\u003c\/strong\u003e 3 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Aluminum\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Primed and painted\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAuto Part Position:\u003c\/strong\u003e Front\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 6.32 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Dimensions:\u003c\/strong\u003e 5.25 inches L x 5.75 inches W x 5.5 inches H\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282127503\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits Manifold:\u003c\/strong\u003e 18-1953-2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Mounting Kits:\u003c\/strong\u003e 18-8554 (with riser 18-1970-2), or 18-8555 (with riser 18-1976-2)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Elbow Gasket:\u003c\/strong\u003e 18-0672\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMercruiser GM Big Block V8 454 cid (Models 330, 340 \u0026amp; 74L)\u003c\/li\u003e\n\u003cli\u003eMercruiser GM Small Block V8 305-350 cid (Models 200, 228, 230, 260 \u0026amp; 898)\u003c\/li\u003e\n\u003cli\u003eMercruiser GM V6 229 \u0026amp; 262 cid (Models 185 \u0026amp; 205)\u003c\/li\u003e\n\u003cli\u003eFits manifold 18-1953-2\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e933220A12\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-1908 manifold spacer fit?\u003c\/strong\u003e The Sierra 18-1908 fits manifold 18-1953-2 and is used on Mercruiser GM Big Block V8 454 cid engines (Models 330, 340 \u0026amp; 74L), GM Small Block V8 305-350 cid engines (Models 200, 228, 230, 260 \u0026amp; 898), and GM V6 229 \u0026amp; 262 cid engines (Models 185 \u0026amp; 205).\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs 18-1908 the same as OEM part 933220A12?\u003c\/strong\u003e Yes, Sierra 18-1908 carries OEM cross-reference number 933220A12, making it a direct equivalent for that original manifold spacer.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow thick is this manifold spacer?\u003c\/strong\u003e The Sierra 18-1908 is a 3 inch spacer designed for manifold 18-1953-2.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is the 18-1908 spacer made from?\u003c\/strong\u003e It is made from aluminum and is primed and painted for added durability and corrosion protection.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-1908 spacer come pre-painted or does it need to be finished after installation?\u003c\/strong\u003e The Sierra 18-1908 arrives primed and painted from the factory, so it is ready to install out of the box without additional finishing.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich mounting kit do I need with the 18-1908 spacer?\u003c\/strong\u003e It depends on the riser installed: use mounting kit 18-8554 with riser 18-1970-2, or mounting kit 18-8555 with riser 18-1976-2, alongside the 18-1908 spacer.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat gasket do I need to seal the elbow to the 18-1908 spacer?\u003c\/strong\u003e Elbow gasket 18-0672 is the closed-style gasket that fits the 18-1908 spacer along with manifold 18-1953-2.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-1908 manifold spacer weigh?\u003c\/strong\u003e The Sierra 18-1908 weighs 6.32 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the package dimensions of the 18-1908 spacer?\u003c\/strong\u003e It ships in a package measuring 5.25 inches long by 5.75 inches wide by 5.5 inches high.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I mount the elbow directly to the 18-1908 spacer using the elbow's original hardware?\u003c\/strong\u003e No, mounting an elbow to the 18-1908 spacer requires its own separate mounting kit rather than reusing the elbow's original mounting hardware.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the difference between the 18-1908 and the 18-1985 spacer?\u003c\/strong\u003e The 18-1908 is a 3 inch spacer for manifold 18-1953-2, while 18-1985 is a 6 inch spacer for the same manifold and requires its own separate mounting kit (18-8556).\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-1908 a genuine Sierra part or a generic aftermarket copy?\u003c\/strong\u003e The 18-1908 is a genuine Sierra International manifold riser spacer, manufactured as a direct equivalent to OEM part 933220A12.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988089221339,"sku":"SIE-18-1908","price":141.1,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/Untitled-1__89250.1753840675.500.750.jpg?v=1785188146"},{"product_id":"sierra-18-1931-1-exhaust-manifold-replaces-volvo-penta-835804-856883-omc-volvo-gm-small-block-v8-305-350-1979-89","title":"Sierra 18-1931-1 Manifold, Replaces Volvo Penta 835804-6 and 856883-4","description":"\u003cp\u003eThe Sierra 18-1931-1 is an exhaust manifold built for Volvo Penta stern drive and inboard applications, engineered to meet or exceed the quality of the original equipment part it replaces. The manifold carries a machined exterior finish and is manufactured to the fit and function of the OEM component it is designed to replace, making it a direct swap for boat owners dealing with a cracked, corroded, or leaking factory manifold.\u003c\/p\u003e\u003cp\u003eExhaust manifolds route hot exhaust gases away from the engine while the surrounding water jacket cools the exhaust before it exits the boat, so the integrity of this component is critical to both engine cooling and safe exhaust handling. The Sierra 18-1931-1 is designed as a like-for-like replacement, and Sierra also offers matching mounting hardware kits engineered specifically for use with this manifold, simplifying installation for anyone replacing a worn unit.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-1931-1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Exhaust Manifold\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Volvo Penta Exhaust Manifolds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 47 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Dimensions:\u003c\/strong\u003e 25.9 x 10.4 x 9.6 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExterior Finish:\u003c\/strong\u003e Machined\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282237431\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Mounting Kits:\u003c\/strong\u003e Sierra 18-8511, Sierra 18-8502\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eDesigned for Volvo Penta exhaust manifold applications.\u003c\/li\u003e\n\u003cli\u003eCompatible with Sierra 18-8511 and Sierra 18-8502 mounting kits, both of which are designed for use with the 18-1931-1 manifold.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eGLM 51630\u003c\/li\u003e\n\u003cli\u003eMallory 9-40901\u003c\/li\u003e\n\u003cli\u003eOsco 5805\u003c\/li\u003e\n\u003cli\u003eVolvo Penta 835804\u003c\/li\u003e\n\u003cli\u003eVolvo Penta 856883\u003c\/li\u003e\n\u003cli\u003eVolvo Penta 835804-6\u003c\/li\u003e\n\u003cli\u003eVolvo Penta 856883-4\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-1931-1 replace?\u003c\/strong\u003e The Sierra 18-1931-1 manifold is interchangeable with GLM 51630, Mallory 9-40901, Osco 5805, Volvo Penta 835804, Volvo Penta 856883, Volvo Penta 835804-6, and Volvo Penta 856883-4.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this manifold a genuine Sierra part or a generic aftermarket copy?\u003c\/strong\u003e It is a genuine Sierra-branded manifold, part number 18-1931-1, built to meet or exceed the quality of the original equipment part it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of the 18-1931-1 manifold?\u003c\/strong\u003e The Sierra 18-1931-1 measures 25.9 x 10.4 x 9.6 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-1931-1 manifold weigh?\u003c\/strong\u003e This manifold weighs 47 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat finish does the manifold have?\u003c\/strong\u003e The Sierra 18-1931-1 has a machined exterior finish.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat application is the 18-1931-1 manifold designed for?\u003c\/strong\u003e It falls under Sierra's Volvo Penta exhaust manifold lineup, designed to replace factory Volvo Penta manifolds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDo I need separate mounting hardware for the 18-1931-1?\u003c\/strong\u003e Yes, Sierra offers the 18-8511 and 18-8502 mounting kits, both specifically designed for use with the 18-1931-1 manifold.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the Sierra 18-8502 kit include hardware?\u003c\/strong\u003e Yes, the Sierra 18-8502 mounting kit, made for use with the 18-1931-1 manifold, includes mounting studs and hardware.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I cross-reference this part using a Volvo Penta OEM number?\u003c\/strong\u003e Yes, the 18-1931-1 replaces Volvo Penta 835804, 835804-6, 856883, and 856883-4.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the UPC available for the 18-1931-1 manifold?\u003c\/strong\u003e The UPC for the Sierra 18-1931-1 manifold is 808282237431.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes this manifold include installation hardware in the box?\u003c\/strong\u003e The manifold itself does not include mounting hardware; the matching 18-8511 or 18-8502 kits are sold separately and provide the studs and hardware.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill this manifold fit other brands besides Volvo Penta?\u003c\/strong\u003e The 18-1931-1 is categorized as a Volvo Penta exhaust manifold and cross-references to Volvo Penta, GLM, Mallory, and Osco part numbers.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988089254107,"sku":"SIE-18-1931-1","price":410.58,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/18-1931-1__34901.1729835971.500.750.jpg?v=1785188194"},{"product_id":"sierra-18-1935-1-exhaust-riser-elbow-replaces-volvo-penta-855384-4-for-volvo-penta-exhaust-manifold-18-1931-1","title":"Sierra 18-1935-1 Exhaust Elbow for Volvo Penta Exhaust Manifold 18-1931-1","description":"\u003cp\u003eThe Sierra 18-1935-1 is an exhaust elbow engineered for Volvo Penta exhaust manifold systems, designed to mount directly to Manifold 18-1931-1 with Elbow Gasket 18-2971-1 completing the seal between the two components. The elbow directs cooling water and spent exhaust gases away from the engine block, and like other components in Sierra's exhaust manifold lineup it is built to meet or exceed the performance of the original equipment part it replaces, standing up to continuous exposure to raw water, heat cycling, and the corrosive marine environment.\u003c\/p\u003e\u003cp\u003eThis elbow ships as a single unit finished in black and is sized for the compact fit required inside typical engine compartments. Because exhaust elbows, manifolds, and gaskets are matched as a system, ordering the correct combination of part numbers ensures a proper seal and reliable exhaust flow. The 18-1935-1 is intended to be installed alongside its matching manifold and gasket rather than as a standalone universal fit.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-1935-1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Category:\u003c\/strong\u003e Volvo Penta Exhaust Manifolds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Manifold:\u003c\/strong\u003e 18-1931-1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Elbow Gasket:\u003c\/strong\u003e 18-2971-1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e Black\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eItem Dimensions (L x W x H):\u003c\/strong\u003e 14.75 x 13 x 9 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 18.64 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1 elbow per package\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282237387\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eDesigned for use with Manifold 18-1931-1\u003c\/li\u003e\n\u003cli\u003ePairs with Elbow Gasket 18-2971-1 for a complete sealed installation\u003c\/li\u003e\n\u003cli\u003eFalls within Sierra's Volvo Penta exhaust manifold product line\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is the Sierra 18-1935-1?\u003c\/strong\u003e It is an exhaust elbow built for Volvo Penta exhaust manifold systems, part number 18-1935-1, designed to route exhaust and cooling water away from the engine.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich manifold does the 18-1935-1 elbow fit?\u003c\/strong\u003e The 18-1935-1 elbow is designed for use with Manifold 18-1931-1.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDo I need a separate gasket to install the 18-1935-1?\u003c\/strong\u003e Yes, the matching Elbow Gasket 18-2971-1 is used with the 18-1935-1 elbow to seal the connection to Manifold 18-1931-1.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color is the 18-1935-1 exhaust elbow?\u003c\/strong\u003e The elbow is finished in black.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-1935-1 weigh?\u003c\/strong\u003e The Sierra 18-1935-1 exhaust elbow weighs 18.64 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of the 18-1935-1 elbow?\u003c\/strong\u003e The item measures 14.75 x 13 x 9 inches (L x W x H).\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many elbows come in one package?\u003c\/strong\u003e Each package contains one 18-1935-1 exhaust elbow.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-1935-1 elbow sold as a complete kit with the manifold and gasket?\u003c\/strong\u003e No, the 18-1935-1 is the elbow only; the manifold (18-1931-1) and elbow gasket (18-2971-1) are separate part numbers sold individually.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat engine type is the 18-1935-1 elbow used on?\u003c\/strong\u003e The 18-1935-1 is part of Sierra's Volvo Penta exhaust manifold product line.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-1935-1 an OEM-equivalent part?\u003c\/strong\u003e Sierra states its exhaust manifold components, including the 18-1935-1 elbow, are built to meet or exceed the original equipment part they replace.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-1935-1?\u003c\/strong\u003e The UPC for the Sierra 18-1935-1 exhaust elbow is 808282237387.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988089286875,"sku":"SIE-18-1935-1","price":181.19,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/Untitled-1__18991.1753840676.500.750.jpg?v=1785189149"},{"product_id":"sierra-18-1932-marine-exhaust-manifold-for-volvo-penta-stern-drive-gm-v-6-replaces-856894-1-cast-iron-port-starboard","title":"Sierra Exhaust Manifold 18-1932 for Volvo Penta GM V6 AQ 175, 205, 430 A\/B, 432, 434 - Replaces 856894-1","description":"\u003cp\u003eThe Sierra 18-1932 is a cast iron exhaust manifold engineered as a direct replacement for the OEM manifold on GM V6-powered Volvo Penta stern drive engines, model years 1993 and before, in the AQ 175, 205, 430 A\/B, 432, and 434 applications. The manifold routes exhaust gases away from the engine while cooling water jackets around the casting help manage engine heat, protecting the engine block from thermal stress during operation. Built from cast iron with a machined exterior finish, it is designed to meet or exceed the fit, form, and function of the original equipment part it replaces, giving boat owners a durable, drop-in solution for manifold replacement or rebuild projects. This manifold fits port and starboard applications. When installing, pair the 18-1932 with the 18-2909 manifold gasket for a proper seal at the mounting surface; the matching 18-2971-1 elbow gasket is used where an 18-1936 elbow is installed alongside this manifold. Because exhaust manifolds are wear items subject to salt water corrosion and thermal cycling, replacing a cracked or leaking manifold with a properly specified part like the 18-1932 helps restore reliable engine cooling and exhaust flow. Always confirm the OE number cast into your existing manifold or stamped on your engine documentation against the cross-reference below before ordering.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-1932\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Exhaust Manifold\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Cast Iron\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Machined\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 32 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e 856894-1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e GM V6 (1993 \u0026amp; Before), Volvo Penta Model AQ 175, 205, 430 A\/B, 432, 434\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompanion Part:\u003c\/strong\u003e Use with 18-2909 Manifold Gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282257613\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eGM (V6) (1993 \u0026amp; Before)\u003c\/li\u003e\n\u003cli\u003eVolvo Penta Model AQ 175\u003c\/li\u003e\n\u003cli\u003eVolvo Penta Model AQ 205\u003c\/li\u003e\n\u003cli\u003eVolvo Penta Model AQ 430 A\/B\u003c\/li\u003e\n\u003cli\u003eVolvo Penta Model AQ 432\u003c\/li\u003e\n\u003cli\u003eVolvo Penta Model AQ 434\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e856894-1\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-1932 manifold fit?\u003c\/strong\u003e The 18-1932 fits GM V6-powered Volvo Penta stern drive engines built in 1993 and before, specifically model AQ 175, 205, 430 A\/B, 432, and 434.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part number does the 18-1932 replace?\u003c\/strong\u003e This manifold is a direct cross-reference for OEM number 856894-1 on the applicable Volvo Penta GM V6 engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-1932 manifold for port or starboard?\u003c\/strong\u003e The Sierra 18-1932 exhaust manifold fits both port and starboard applications on the applicable GM V6 Volvo Penta engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is the 18-1932 manifold made from?\u003c\/strong\u003e It is constructed from cast iron with a machined exterior finish for durability in the marine exhaust environment.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-1932 manifold weigh?\u003c\/strong\u003e The Sierra 18-1932 exhaust manifold weighs 32 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat gasket should I use with the 18-1932 manifold?\u003c\/strong\u003e Use the 18-2909 manifold gasket with the 18-1932 to ensure a proper seal at installation.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-1932 manifold work with the 18-1936 elbow?\u003c\/strong\u003e Yes, when the 18-1936 elbow is used with the 18-1932 manifold, the 18-2971-1 elbow gasket is the matching gasket for that connection.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-1932 a genuine OEM part or aftermarket?\u003c\/strong\u003e The 18-1932 is a Sierra-manufactured replacement manifold, built to meet or exceed the specification of the original 856894-1 manifold it replaces rather than being a factory OEM part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the 18-1932 manifold fit any Volvo Penta engine?\u003c\/strong\u003e No, fitment is limited to GM V6 engines from 1993 and before in the AQ 175, 205, 430 A\/B, 432, and 434 models; it is not a universal fit across all Volvo Penta engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the difference between the 18-1932 and the 18-1936?\u003c\/strong\u003e The 18-1932 is the exhaust manifold itself, while the 18-1936 is a separate elbow component used alongside it, each requiring its own matching gasket.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988089319643,"sku":"SIE-18-1932","price":353.02,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-1932_lg__11009.1722351929.500.750.jpg?v=1785188982"},{"product_id":"sierra-18-1937-exhaust-elbow-replaces-mercruiser-98562a6-fits-3-7l-224-cu-in-4-cyl-165-170-180-190","title":"Sierra 18-1937 Exhaust Elbow for Mercruiser 3.7L Engines with Aluminum Exhaust Manifolds","description":"\u003cp\u003eThe Sierra 18-1937 is an exhaust elbow built for Mercruiser 3.7L (224 cid) 4-cylinder sterndrive engines equipped with aluminum exhaust manifolds. The elbow routes exhaust gases and cooling water away from the manifold and out through the exhaust system, and it is manufactured as a direct OE replacement that is fully interchangeable with the original equipment part it replaces. It is primed and painted in grey for added durability and corrosion protection, and it arrives ready to install out of the box without additional machining or fitting.\u003c\/p\u003e\u003cp\u003eThis elbow is designed specifically for engines fitted with aluminum exhaust manifolds rather than cast iron manifolds, so confirming manifold material before ordering ensures correct fitment. It fits 3.7L engines rated at 170 HP for the 1985-1986 model years within serial number range 6916779 to B434940, as well as 3.7L engines rated at 180 HP for 1987 within serial number range B436391 to B775248. Always verify your engine's serial number against these ranges before purchase.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-1937\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Exhaust Elbow\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Mercruiser Exhaust Manifolds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Engine:\u003c\/strong\u003e 3.7L (224 cid) 4-cylinder Mercruiser engines\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExhaust Manifold Type:\u003c\/strong\u003e Aluminum\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment (170 HP):\u003c\/strong\u003e 1985-1986, serial numbers 6916779 to B434940\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment (180 HP):\u003c\/strong\u003e 1987, serial numbers B436391 to B775248\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e Grey\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Primed and painted\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Dimensions:\u003c\/strong\u003e 20 inches x 9 inches x 7 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 34.53 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282126766\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e3.7L (224 cid) engine, 170 HP, 1985-1986, serial numbers 6916779 to B434940, aluminum exhaust manifolds\u003c\/li\u003e\n\u003cli\u003e3.7L (224 cid) engine, 180 HP, 1987, serial numbers B436391 to B775248, aluminum exhaust manifolds\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-1937 exhaust elbow fit?\u003c\/strong\u003e The Sierra 18-1937 fits Mercruiser 3.7L (224 cid) 4-cylinder engines equipped with aluminum exhaust manifolds, covering 170 HP engines from 1985-1986 (serial numbers 6916779 to B434940) and 180 HP engines from 1987 (serial numbers B436391 to B775248).\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-1937 elbow work with cast iron exhaust manifolds?\u003c\/strong\u003e No, the 18-1937 elbow is designated for engines with aluminum exhaust manifolds; a separate part number applies to the cast iron manifold version, so confirm your manifold material before ordering.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow do I confirm my engine matches this part?\u003c\/strong\u003e Check your Mercruiser 3.7L engine's serial number against the ranges listed for the 18-1937 elbow: 6916779-B434940 for the 170 HP 1985-1986 application, or B436391-B775248 for the 180 HP 1987 application.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-1937 a direct OEM replacement?\u003c\/strong\u003e Yes, the 18-1937 elbow is manufactured as a direct OE replacement and is fully interchangeable with the original equipment elbow it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color and finish does the 18-1937 elbow have?\u003c\/strong\u003e This exhaust elbow is grey and comes primed and painted for added durability and corrosion protection.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-1937 exhaust elbow weigh?\u003c\/strong\u003e The Sierra 18-1937 exhaust elbow weighs 34.53 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the package dimensions for the 18-1937 elbow?\u003c\/strong\u003e It ships in a package measuring 20 inches x 9 inches x 7 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs installation straightforward for this elbow?\u003c\/strong\u003e The Sierra 18-1937 arrives ready to install out of the box, with no additional fitting required before mounting to a compatible 3.7L Mercruiser engine.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included when I order part number 18-1937?\u003c\/strong\u003e Ordering the 18-1937 includes one exhaust elbow; no gasket or additional hardware is specified with this part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the 18-1937 fit a 3.7L engine outside the listed serial number ranges?\u003c\/strong\u003e Fitment for the Sierra 18-1937 is specific to the 170 HP 1985-1986 range (6916779-B434940) and the 180 HP 1987 range (B436391-B775248); engines outside these ranges should be verified before purchase.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988089352411,"sku":"SIE-18-1937","price":338.67,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/18-1937__94011.1727708051.500.750.jpg?v=1785189034"},{"product_id":"exhaust-manifold-with-hardware-for-mercruiser-3-0l-181-cid-replaces-99798a18-fits-140-3-0-1983-95","title":"Sierra Mercruiser Exhaust Manifold w\/Hardware 18-1956-3","description":"\u003cp\u003eThe Sierra 18-1956-3 is an exhaust manifold with hardware, built for Mercruiser exhaust systems. It is designed to work as part of a complete exhaust manifold assembly, pairing with the correct elbow, riser, gaskets, and mounting hardware to route exhaust gases away from the engine safely and reliably. This manifold is engineered to fit directly with Sierra's 18-1978 manifold elbow and 18-1975-1 manifold riser, both of which are listed by the manufacturer as compatible with this manifold. When installed with the 18-1978 elbow, the assembly uses the 18-2833 elbow gasket and 18-4362 mounting kit; when installed with the 18-1975-1 riser, the assembly uses the 18-2819-1 elbow gasket, 18-8551 mounting hardware, and 18-2748 exhaust boot. This gives installers a clear, documented path to building out a matched exhaust manifold system rather than guessing at compatible parts. At 47 pounds, this is a heavy-duty, full-size manifold intended for direct replacement in Mercruiser exhaust manifold applications. Sourcing a manifold with the correct manufacturer-specified mating parts helps ensure a proper seal and secure mounting, reducing the risk of exhaust leaks or improper fitment that can occur when parts are mixed from unverified sources.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-1956-3\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Mercruiser Exhaust Manifolds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 47 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282371463\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Manifold Elbow:\u003c\/strong\u003e 18-1978\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Manifold Riser:\u003c\/strong\u003e 18-1975-1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eElbow Gasket (with 18-1978):\u003c\/strong\u003e 18-2833\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting Kit (with 18-1978 elbow):\u003c\/strong\u003e 18-4362\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eElbow Gasket (with 18-1975-1 riser):\u003c\/strong\u003e 18-2819-1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting Hardware (with 18-1975-1 riser):\u003c\/strong\u003e 18-8551\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExhaust Boot (with 18-1975-1 riser):\u003c\/strong\u003e 18-2748\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is Sierra part 18-1956-3?\u003c\/strong\u003e It is a Sierra exhaust manifold with hardware, listed under Mercruiser exhaust manifolds, part number 18-1956-3.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-1956-3 manifold come with mounting hardware?\u003c\/strong\u003e Yes, the 18-1956-3 is sold as an exhaust manifold with hardware included.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-1956-3 exhaust manifold weigh?\u003c\/strong\u003e The Sierra 18-1956-3 exhaust manifold weighs 47 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich elbow fits the 18-1956-3 manifold?\u003c\/strong\u003e Sierra's 18-1978 manifold elbow is listed as compatible for use with the 18-1956-3 manifold.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich riser fits the 18-1956-3 manifold?\u003c\/strong\u003e Sierra's 18-1975-1 manifold riser is listed as compatible for use with the 18-1956-3 manifold.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat gasket do I need if I install the 18-1978 elbow with this manifold?\u003c\/strong\u003e Use the 18-2833 elbow gasket when pairing the 18-1978 elbow with the 18-1956-3 manifold; it is included in the 18-4362 mounting kit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat gasket do I need if I install the 18-1975-1 riser with this manifold?\u003c\/strong\u003e Use the 18-2819-1 elbow gasket when pairing the 18-1975-1 riser with the 18-1956-3 manifold.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat mounting hardware is used with the 18-1975-1 riser on this manifold?\u003c\/strong\u003e The 18-8551 hardware kit provides the mounting hardware for the 18-1975-1 riser used with the 18-1956-3 manifold, and the 18-2748 exhaust boot is used with that same riser.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included in the 18-4362 mounting kit?\u003c\/strong\u003e The 18-4362 mounting kit, used with the 18-1978 elbow on the 18-1956-3 manifold assembly, includes the 18-2833 elbow gasket.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the UPC for the 18-1956-3 exhaust manifold available?\u003c\/strong\u003e Yes, the Sierra 18-1956-3 exhaust manifold carries UPC 808282371463.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat category does the 18-1956-3 fall under?\u003c\/strong\u003e The 18-1956-3 is categorized as a Mercruiser exhaust manifold by Sierra.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDo I need to buy the elbow and riser separately from the 18-1956-3 manifold?\u003c\/strong\u003e Yes, the 18-1956-3 is the manifold itself; the 18-1978 elbow or 18-1975-1 riser, along with their respective gaskets and mounting hardware, are separate parts documented as compatible with this manifold.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988089385179,"sku":"SIE-18-1956-3","price":575.39,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/18-1956-3__20950.1737824252.500.750.jpg?v=1785329169"},{"product_id":"sierra-18-1952-1-marine-exhaust-manifold-replaces-mercruiser-99746a8-fits-gm-v-6-229-262-cid-1985-2002","title":"Sierra Exhaust Manifold 18-1952-1, Replaces Mercruiser 99746A8, Fits MCM GM V-6 229 and 262 cid Engines 1985-2002","description":"\u003cp\u003eThe Sierra 18-1952-1 is a direct-replacement exhaust manifold built for MCM GM V-6 229 and 262 cid engines (1985-2002). It is designed to fit either the port or starboard side of the engine, so a single part number covers both mounting positions. The manifold carries a machined exterior finish for a precise, reliable fit against the cylinder head and riser\/elbow assembly, and it is supplied with a mounting package to simplify installation.\u003c\/p\u003e\u003cp\u003eThis manifold cross-references directly to Mercruiser 99746A8, 99746A17, and 99746A3, along with equivalent aftermarket numbers, making it a straightforward swap when replacing a worn, cracked, or corroded factory manifold. Sierra manufactures this part to meet or exceed the specifications of the original equipment it replaces, giving boat owners a dependable option for keeping their exhaust system sealed and functioning correctly. At 34 pounds, it matches the weight profile of the OEM cast manifold it is designed to replace.\u003c\/p\u003e\u003cp\u003eBecause the manifold connects directly to the exhaust riser and elbow, it is commonly serviced alongside related components such as manifold gaskets, riser elbows, and mounting kits. Always confirm your engine's exact model and cid rating before ordering to ensure correct fitment.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-1952-1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 34 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExterior Finish:\u003c\/strong\u003e Machined\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting Position:\u003c\/strong\u003e Port and starboard\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine Fitment:\u003c\/strong\u003e MCM GM V-6 229 and 262 cid engines (1985-2002)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting Hardware:\u003c\/strong\u003e Supplied with mounting package\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282237448\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Mercruiser Exhaust Manifolds\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMCM GM V-6 229 and 262 cid engines (1985-2002)\u003c\/li\u003e\n\u003cli\u003eFits port and starboard mounting positions\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMercruiser 99746A8\u003c\/li\u003e\n\u003cli\u003eMercruiser 99746A17\u003c\/li\u003e\n\u003cli\u003eMercruiser 99746A3\u003c\/li\u003e\n\u003cli\u003eBarr MC-1-99746\u003c\/li\u003e\n\u003cli\u003eGLM 51220\u003c\/li\u003e\n\u003cli\u003eMallory 9-40505\u003c\/li\u003e\n\u003cli\u003eOsco 9745\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-1952-1 exhaust manifold fit?\u003c\/strong\u003e The 18-1952-1 fits MCM GM V-6 229 and 262 cid engines built between 1985 and 2002.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-1952-1 fit both the port and starboard side?\u003c\/strong\u003e Yes, this manifold is designed to fit either the port or starboard mounting position, so one part number covers both sides.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM Mercruiser part numbers does this manifold replace?\u003c\/strong\u003e The Sierra 18-1952-1 replaces Mercruiser 99746A8, 99746A17, and 99746A3.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAre there other aftermarket cross-reference numbers for this part?\u003c\/strong\u003e Yes, the 18-1952-1 also cross-references to Barr MC-1-99746, GLM 51220, Mallory 9-40505, and Osco 9745.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-1952-1 exhaust manifold weigh?\u003c\/strong\u003e It weighs 34 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat finish does the Sierra 18-1952-1 manifold have?\u003c\/strong\u003e It has a machined exterior finish for a precise fit against the cylinder head and riser assembly.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-1952-1 come with mounting hardware?\u003c\/strong\u003e Yes, the Sierra 18-1952-1 is supplied with a mounting package for installation.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-1952-1 a genuine Mercruiser part or an aftermarket equivalent?\u003c\/strong\u003e The 18-1952-1 is a Sierra-manufactured aftermarket manifold built to meet or exceed the specifications of the OEM Mercruiser 99746A8 and 99746A17 manifolds it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the 18-1952-1 work with my riser and elbow assembly?\u003c\/strong\u003e The 18-1952-1 manifold is compatible with standard riser elbow and gasket components used on MCM GM V-6 229 and 262 cid engine setups; confirm your specific riser and elbow part numbers before ordering.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the difference between the 18-1952-1 and a used OEM manifold?\u003c\/strong\u003e The 18-1952-1 is a new manifold manufactured to meet or exceed OEM specifications, offering consistent fit and finish compared to a used factory manifold that may show wear or corrosion.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDo I need to order a separate manifold for each side of the engine?\u003c\/strong\u003e No, because the 18-1952-1 fits either the port or starboard side, the same part number can be used on both sides of a V-6 engine that requires this manifold.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-1952-1 include the manifold gasket?\u003c\/strong\u003e The listing for 18-1952-1 confirms it ships with a mounting package; gaskets specific to your riser and elbow combination should be selected separately based on that hardware.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988089417947,"sku":"SIE-18-1952-1","price":354.57,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/Untitled-1__46118.1753840674.500.750.jpg?v=1785188893"},{"product_id":"sierra-18-1953-2-marine-exhaust-manifold-replaces-mercruiser-87114a19-for-gm-v8-305-350-cu-in-models-200-228-230-260-898","title":"Sierra Exhaust Manifold 18-1953-2 for GM V-8 305\/350\/377 cid MCM\/MIE Marine Engines","description":"\u003cp\u003eThis Sierra exhaust manifold, part number 18-1953-2, is built for GM V-8 305, 350, and 377 cid MCM\/MIE marine engines (1983-2002). It routes hot exhaust gases away from the engine block and mixes them with cooling water before they exit through the riser and elbow assembly, protecting the engine from heat damage while running. The manifold is a universal fit that installs on either the port or starboard side of the engine, so one part number covers both mounting locations.\u003c\/p\u003e\u003cp\u003eThe manifold pairs with a specific set of Sierra components to complete the exhaust path. It accepts either the 18-1974-1 elbow (3 inch hose, 0 degree down angle) or the 18-1976-2 elbow (4 inch hose, 7 degree down angle), sealed with elbow gasket 18-2849-1, 18-0897, or 18-0672. For installations that need additional height, the manifold works with the 18-1908 three-inch spacer or the 18-1985 six-inch spacer, each requiring its own mounting kit. Sierra engineers this manifold to meet or exceed the performance of the original equipment part it replaces, and it is backed by a limited warranty.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-1953-2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Exhaust Manifold\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282195151\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 49.1 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine Fitment:\u003c\/strong\u003e GM V-8 305, 350, and 377 cid MCM\/MIE marine engines (1983-2002)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSide:\u003c\/strong\u003e Port and starboard (universal fit)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Elbow (3 inch hose):\u003c\/strong\u003e 18-1974-1, 0 degree down angle\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Elbow (4 inch hose):\u003c\/strong\u003e 18-1976-2, 7 degree down angle\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Spacer (3 inch):\u003c\/strong\u003e 18-1908\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Spacer (6 inch):\u003c\/strong\u003e 18-1985\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Elbow Gasket:\u003c\/strong\u003e 18-2849-1, 18-0897, or 18-0672\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eGM V-8 305, 350, and 377 cid MCM\/MIE marine engines (1983-2002)\u003c\/li\u003e\n\u003cli\u003eFits both port and starboard mounting positions\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-1953-2 exhaust manifold fit?\u003c\/strong\u003e The 18-1953-2 manifold is built for GM V-8 305, 350, and 377 cid MCM\/MIE marine engines (1983-2002).\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes 18-1953-2 fit both port and starboard sides?\u003c\/strong\u003e Yes, the Sierra 18-1953-2 manifold is a universal fit that installs on either the port or starboard side of the engine.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does this exhaust manifold weigh?\u003c\/strong\u003e The Sierra 18-1953-2 exhaust manifold weighs 49.1 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich elbow works with the 18-1953-2 manifold?\u003c\/strong\u003e Two elbow options fit this manifold: the 18-1974-1 (3 inch hose, 0 degree down angle) and the 18-1976-2 (4 inch hose, 7 degree down angle).\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat gasket do I need to seal the elbow to the 18-1953-2 manifold?\u003c\/strong\u003e Elbow gasket 18-2849-1, 18-0897, or 18-0672 is used to seal the elbow to this manifold.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I raise the riser height on this manifold?\u003c\/strong\u003e Yes, the 18-1953-2 manifold accepts a 3 inch spacer (18-1908) or a 6 inch spacer (18-1985) for additional riser height, each requiring its own mounting kit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs a mounting kit included with the manifold?\u003c\/strong\u003e The manifold itself is the exhaust manifold casting; mounting kits for the elbow and spacer combinations are separate components matched to the elbow chosen.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this a genuine Sierra part or aftermarket?\u003c\/strong\u003e The 18-1953-2 is a genuine Sierra part, engineered to meet or exceed the performance of the original equipment part it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the manufacturer part number for this manifold?\u003c\/strong\u003e The manufacturer part number is 18-1953-2.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes this manifold come with a warranty?\u003c\/strong\u003e The Sierra 18-1953-2 exhaust manifold is backed by a limited warranty.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988089450715,"sku":"SIE-18-1953-2","price":315.22,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/18-1953-2__05081.1737866868.500.750.jpg?v=1785189050"},{"product_id":"sierra-18-1966-1-exhaust-manifold-for-mercruiser-3-0l-lx-1990-newer-replaces-oem-806867a2","title":"Sierra 18-1966-1 Manifold, Replaces 806867A2, Fits Mercruiser 3.0L\/LX 1990 \u0026 Newer","description":"\u003cp\u003eThe Sierra 18-1966-1 is a manifold engineered as a direct OE replacement for Mercruiser 3.0L\/LX inboard\/outboard engines built 1990 and newer, as well as the Marine Power Engine Model E181S. It is designed to be fully interchangeable with the original equipment manifolds it replaces, so it bolts in using the same mounting points and connections as the factory part it is standing in for. The manifold arrives primed and painted, giving it a layer of corrosion protection for the marine engine compartment environment, and it is ready to install straight out of the box without additional prep work. This makes it a straightforward swap for boat owners and marine technicians replacing a cracked, corroded, or failed manifold on a 3.0L\/LX Mercruiser I\/O powerplant. At 49 pounds, it matches the weight profile of the OEM manifold it is built to replace, and it is finished in black to match typical engine hardware. Because it carries the same Sierra part number system used across the marine aftermarket, it cross-references directly to the OEM numbers used to identify the original Mercruiser manifold, helping buyers confirm compatibility before ordering.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-1966-1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Manifold\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment:\u003c\/strong\u003e Mercruiser 3.0L\/LX (1990 \u0026amp; Newer); Marine Power Engine Model E181S\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 49 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e Black\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Taiwan\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1 manifold per package\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282371456\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMercruiser 3.0L\/LX (1990 \u0026amp; Newer)\u003c\/li\u003e\n\u003cli\u003eMarine Power Engine Model E181S\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e806867A2\u003c\/li\u003e\n\u003cli\u003e806867A3\u003c\/li\u003e\n\u003cli\u003e806867A8\u003c\/li\u003e\n\u003cli\u003e806867A9\u003c\/li\u003e\n\u003cli\u003e806867A12\u003c\/li\u003e\n\u003cli\u003e816329A3\u003c\/li\u003e\n\u003cli\u003e860235A03\u003c\/li\u003e\n\u003cli\u003e99798A18\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-1966-1 manifold fit?\u003c\/strong\u003e The 18-1966-1 fits Mercruiser 3.0L\/LX engines built 1990 and newer, as well as the Marine Power Engine Model E181S.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-1966-1 a direct OEM replacement?\u003c\/strong\u003e Yes, this manifold is manufactured as a direct OE replacement and is fully interchangeable with the original equipment manifolds it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part numbers does the 18-1966-1 cross-reference to?\u003c\/strong\u003e The 18-1966-1 manifold cross-references OEM numbers 806867A2, 806867A3, 806867A8, 806867A9, 806867A12, 816329A3, 860235A03, and 99798A18.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does this manifold weigh?\u003c\/strong\u003e The Sierra 18-1966-1 manifold weighs 49 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the manifold need to be painted before installation?\u003c\/strong\u003e No, the 18-1966-1 arrives primed and painted, so it is ready to install out of the box.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color is the 18-1966-1 manifold?\u003c\/strong\u003e It is finished in black.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhere is the 18-1966-1 manifold manufactured?\u003c\/strong\u003e The country of origin listed for this manifold is Taiwan.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many manifolds come in the package?\u003c\/strong\u003e One 18-1966-1 manifold is included per package.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-1966-1 the same as Sierra's 18-1843 exhaust manifold?\u003c\/strong\u003e No, the 18-1966-1 is a distinct part number from the 18-1843 dry-joint exhaust manifold; they carry different OEM cross-references and fit different engine applications, so buyers should confirm they are ordering the part number that matches their specific engine.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill this manifold fit an engine older than 1990?\u003c\/strong\u003e The 18-1966-1 is designated for Mercruiser 3.0L\/LX engines built 1990 and newer, plus the Marine Power Engine Model E181S; fitment outside that range is not specified.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this a genuine Mercruiser part or an aftermarket part?\u003c\/strong\u003e The Sierra 18-1966-1 is an aftermarket manifold engineered to be fully interchangeable with the original Mercruiser equipment it replaces.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988089483483,"sku":"SIE-18-1966-1","price":584.51,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/18-1966-1__73035.1737869638.500.750.jpg?v=1785188598"},{"product_id":"sierra-18-1975-1-exhaust-manifold-riser-with-tube-replaces-mercury-12076a2-fits-mercruiser-2-5l-and-3-0l-lx-4-cylinder-1982-and-newer","title":"Sierra 18-1975-1 Manifold Riser with Exhaust Tube, Replaces Mercury Marine 12076A2, Fits MCM 2.5L \u0026 3.0L\/LX","description":"\u003cp\u003eThe Sierra 18-1975-1 is a manifold riser with integrated exhaust tube, built as a direct replacement for the Mercury Marine exhaust riser used on late model Mercruiser 4 cylinder engines, specifically the MCM 2.5L and 3.0L\/LX (1982 and newer). The riser directs exhaust gases and cooling water away from the manifold and out through the exhaust elbow, and is engineered to the same fit and function as the original Mercury Marine 12076A2 riser it replaces.\u003c\/p\u003e\u003cp\u003eThis riser is designed for use with Sierra manifolds 18-1954-1, 18-1955-1, and 18-1956-3. A complete installation calls for the matching elbow gasket (18-2819-1), the 18-8551 mounting hardware kit (which includes only the hardware for this elbow), and the 18-2748 exhaust boot to complete a sealed exhaust path. The riser is finished in white and weighs 18.35 pounds as shipped.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-1975-1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Manifold Riser with Exhaust Tube\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e 12076A2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e White\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 18.35 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUsed With Manifolds:\u003c\/strong\u003e 18-1954-1, 18-1955-1, 18-1956-3\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eElbow Gasket:\u003c\/strong\u003e 18-2819-1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting Hardware:\u003c\/strong\u003e 18-8551\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExhaust Boot:\u003c\/strong\u003e 18-2748\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282186470\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMercury Marine \/ Mercruiser late model 4 cylinder engines\u003c\/li\u003e\n\u003cli\u003eMCM 2.5L and 3.0L\/LX, 1982 and newer\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eMercury Marine 12076A2\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-1975-1 replace?\u003c\/strong\u003e The Sierra 18-1975-1 manifold riser is a direct replacement for Mercury Marine OEM part 12076A2.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich engines is this riser designed for?\u003c\/strong\u003e This riser fits late model Mercruiser 4 cylinder engines, specifically the MCM 2.5L and 3.0L\/LX, 1982 and newer.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-1975-1 riser weigh?\u003c\/strong\u003e The Sierra 18-1975-1 manifold riser weighs 18.35 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color is the 18-1975-1 manifold riser?\u003c\/strong\u003e It ships finished in white.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich manifolds does the 18-1975-1 work with?\u003c\/strong\u003e This riser is designed for use with Sierra manifolds 18-1954-1, 18-1955-1, and 18-1956-3.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat gasket do I need with the 18-1975-1 riser?\u003c\/strong\u003e Use elbow gasket 18-2819-1 with the Sierra 18-1975-1 manifold riser.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-1975-1 come with mounting hardware?\u003c\/strong\u003e No, mounting hardware is sold separately as hardware kit 18-8551, which includes only the hardware needed for the 18-1975-1 elbow.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs an exhaust boot required with this riser?\u003c\/strong\u003e Yes, the 18-2748 exhaust boot is used to complete the sealed exhaust path with the 18-1975-1 riser.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-1975-1 genuine Sierra or aftermarket?\u003c\/strong\u003e It is a genuine Sierra part, manufactured as an aftermarket replacement equivalent to Mercury Marine 12076A2.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included with the 18-1975-1 riser?\u003c\/strong\u003e The listing includes one Sierra 18-1975-1 riser with exhaust tube; the elbow gasket, mounting hardware, and exhaust boot are separate part numbers.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the 18-1975-1 fit older Mercruiser engines before 1982?\u003c\/strong\u003e Fitment for the Sierra 18-1975-1 is confirmed for MCM 2.5L and 3.0L\/LX engines from 1982 and newer; earlier engines are not confirmed.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat warranty applies to the Sierra 18-1975-1?\u003c\/strong\u003e The 18-1975-1 is covered under Sierra's standard customer satisfaction warranty, as with all Sierra parts.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988089516251,"sku":"SIE-18-1975-1","price":281.84,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/18-1975-1__37458.1737888203.500.750.jpg?v=1785188675"},{"product_id":"sierra-18-1957-2-exhaust-manifold-replaces-mercruiser-807078a6-89011a8-gm-big-block-v8-454-cu-in-7-4l-models-330-340","title":"Sierra 18-1957-2 Exhaust Manifold for Mercruiser Stern Drive Engines (Replaces 89011A8)","description":"\u003cp\u003eThe Sierra 18-1957-2 is an exhaust manifold built for Mercruiser stern drive engines, designed to move spent exhaust gases away from the engine and into the exhaust elbow and riser system while keeping the engine bay running cool and dry. It is manufactured to meet or exceed original equipment quality, giving boat owners a direct, no-compromise replacement for a worn, cracked, or corroded factory manifold. The 18-1957-2 is finished in white and will fit either the port or starboard side of the engine, so it works whichever side needs replacing.\u003c\/p\u003e\u003cp\u003eThis manifold pairs with Sierra's related riser and spacer components, including the 18-1908K manifold spacer kit, which is specifically listed as compatible with the 18-1957-2 and includes spacers, a restrictor, gaskets, and mounting hardware for a complete riser installation. Buyers replacing a manifold on a Mercruiser stern drive engine can order the 18-1957-2 directly using its own part number or any of its Mercruiser OEM cross-reference numbers.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-1957-2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Exhaust Manifold\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282371357\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 47.55 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 20.25 x 9.75 x 7 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e White\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting Side:\u003c\/strong\u003e Fits either port or starboard\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded Components:\u003c\/strong\u003e Manifold\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Accessory:\u003c\/strong\u003e 18-1908K Manifold Spacer Kit\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMercruiser stern drive engines\u003c\/li\u003e\n\u003cli\u003eFits either port or starboard side\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMercruiser 89011A8\u003c\/li\u003e\n\u003cli\u003eMercruiser 807078A6\u003c\/li\u003e\n\u003cli\u003eMercruiser 807078T10\u003c\/li\u003e\n\u003cli\u003eMercruiser 807078T09\u003c\/li\u003e\n\u003cli\u003eMercruiser 807078A4\u003c\/li\u003e\n\u003cli\u003eMercruiser 807078A2\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-1957-2 manifold fit?\u003c\/strong\u003e The 18-1957-2 is built for Mercruiser stern drive engines and can be installed on either the port or starboard side.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this manifold for port or starboard?\u003c\/strong\u003e The Sierra 18-1957-2 fits either port or starboard, so the same part number works on both sides of the engine.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat Mercruiser OEM numbers does the 18-1957-2 replace?\u003c\/strong\u003e It replaces Mercruiser 89011A8, 807078A6, 807078T10, 807078T09, 807078A4, and 807078A2.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-1957-2 exhaust manifold weigh?\u003c\/strong\u003e It weighs 47.55 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of the 18-1957-2 manifold?\u003c\/strong\u003e The packaged dimensions of the Sierra 18-1957-2 manifold are 20.25 x 9.75 x 7 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color is the 18-1957-2 manifold?\u003c\/strong\u003e The Sierra 18-1957-2 exhaust manifold is finished in white.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-1957-2 an OEM part or an aftermarket replacement?\u003c\/strong\u003e It is a Sierra-manufactured aftermarket manifold made to meet or exceed original equipment quality, sold under Sierra's own part number 18-1957-2.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-1957-2 come with mounting hardware or gaskets?\u003c\/strong\u003e The manifold itself includes only the manifold; mounting hardware and gaskets for the riser connection are supplied separately in the 18-1908K manifold spacer kit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included in the box with this manifold?\u003c\/strong\u003e The Sierra 18-1957-2 ships as a single manifold unit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan the 18-1908K spacer kit be used with the 18-1957-2 manifold?\u003c\/strong\u003e Yes, the 18-1908K manifold spacer kit is specifically listed as compatible with the 18-1957-2 and includes spacers, a restrictor, gaskets, and mounting hardware.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow is the Sierra 18-1957-2 different from a used or reconditioned manifold?\u003c\/strong\u003e The 18-1957-2 is a new manifold manufactured to meet or exceed original equipment quality, rather than a rebuilt or salvaged unit.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988089549019,"sku":"SIE-18-1957-2","price":345.67,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/Untitled-1__56703.1753840675.500.750.jpg?v=1785188469"},{"product_id":"sierra-18-1986-1-exhaust-manifold-replaces-oem-3857723-fits-gm-small-block-v8-305-350-cu-in","title":"Sierra Exhaust Manifold 18-1986-2, Replaces OE 3857723, Fits GM Small Block V8 305-350 cid","description":"\u003cp\u003eThe Sierra Exhaust Manifold 18-1986-2 is a cast iron marine exhaust manifold engineered for GM Small Block V8 engines in the 305 to 350 cubic inch range, a common power plant configuration in stern-drive and inboard boat applications. Exhaust manifolds route hot exhaust gases away from the engine block while providing the water-jacketed cooling passages marine engines require to keep exhaust components safe to operate near fuel, bilge, and crew areas. This manifold is built to meet or exceed the performance of the original equipment part it replaces, using cast iron construction for the strength and heat tolerance the marine exhaust environment demands.\u003c\/p\u003e\u003cp\u003eThis manifold pairs with the corresponding manifold gasket and mounting kit for a complete installation, so buyers replacing an aging or cracked manifold can source the matching hardware at the same time. It is designed as a direct fit for GM Small Block V8 305-350 cid engines, making it a straightforward swap for boat owners maintaining stern-drive and inboard exhaust systems.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-1986-2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Exhaust Manifold\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Cast Iron\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine Application:\u003c\/strong\u003e GM Small Block V8 305-350 cu in\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e 3857723\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Manifold Gasket:\u003c\/strong\u003e 18-2949\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Mounting Kit:\u003c\/strong\u003e 18-8502\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 40.1 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282391232\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eGM Small Block V8, 305-350 cubic inch engines\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e3857723\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-1986-2 exhaust manifold fit?\u003c\/strong\u003e The 18-1986-2 manifold is built for GM Small Block V8 engines in the 305 to 350 cubic inch range, a common configuration in stern-drive and inboard marine engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part number does this manifold cross-reference?\u003c\/strong\u003e It cross-references OEM number 3857723, so if your original manifold carries that number, the 18-1986-2 is a direct equivalent.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-1986-2 manifold weigh?\u003c\/strong\u003e This exhaust manifold weighs 40.1 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the manifold made of?\u003c\/strong\u003e The 18-1986-2 is made of cast iron, chosen for its strength and heat resistance in the marine exhaust environment.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDo I need a separate gasket to install this manifold?\u003c\/strong\u003e Yes, the 18-1986-2 manifold is installed with manifold gasket 18-2949, which is sold separately.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs a mounting kit required for installation?\u003c\/strong\u003e Installation uses mounting kit 18-8502 alongside the 18-1986-2 manifold and its gasket.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this a genuine Sierra part or an aftermarket copy?\u003c\/strong\u003e The 18-1986-2 is a genuine Sierra manifold engineered to meet or exceed the original equipment part it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat comes in the box with this manifold?\u003c\/strong\u003e The package includes the 18-1986-2 cast iron exhaust manifold; the manifold gasket (18-2949) and mounting kit (18-8502) are separate items.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill this manifold work with other engine sizes besides 305-350 cid?\u003c\/strong\u003e The 18-1986-2 is specified for GM Small Block V8 engines in the 305 to 350 cubic inch range; it is not listed for other displacements.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy would I need to replace my exhaust manifold?\u003c\/strong\u003e Marine exhaust manifolds like the 18-1986-2 are commonly replaced when the original develops cracks, corrosion, or coolant leaks from age and constant heat cycling.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988089614555,"sku":"SIE-18-1986-2","price":399.24,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-1986_lg__16636.1733495359.500.750.jpg?v=1785188062"},{"product_id":"sierra-18-1970-2-exhaust-manifold-elbow-for-mercruiser-gm-big-block-v8-454-7-4l-fits-manifold-18-1957-2","title":"Sierra 18-1970-2 Exhaust Riser Elbow for Mercruiser Exhaust Manifolds","description":"\u003cp\u003eThe Sierra 18-1970-2 is an exhaust riser elbow built for Mercruiser exhaust manifold applications. It is manufactured as a direct OE replacement and is fully interchangeable with the original equipment part it replaces, so it drops into the same mounting points without modification. The riser elbow arrives primed and painted in white for added corrosion resistance and protection during storage and installation, and it is ready to install straight out of the box without additional finishing work.\u003c\/p\u003e\u003cp\u003eThis riser elbow is designed to work with specific mounting hardware rather than as a stand-alone bolt-on part. It is compatible with mounting kit 18-8529, which includes 18-0897 elbow gaskets, giving you the gaskets needed for a proper seal at installation. It is also compatible with mounting kit 18-8554, which is used together with the 18-1908 manifold spacer when mounting to manifold 18-1953-2. Selecting the correct mounting kit for your setup ensures the riser elbow seats and seals correctly against the manifold.\u003c\/p\u003e\u003cp\u003eBecause exhaust risers see constant exposure to combustion byproducts, raw water, and heat, the painted finish and OE-grade construction of the 18-1970-2 are intended to hold up under continuous marine engine operation. Confirm your existing riser and mounting kit part numbers before ordering to make sure this elbow matches your manifold setup.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-1970-2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Category:\u003c\/strong\u003e Mercruiser Exhaust Manifolds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 21.8 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Dimensions:\u003c\/strong\u003e 11 x 10.9 x 6.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e White\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Primed and painted\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Taiwan\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282374013\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Mounting Kits:\u003c\/strong\u003e 18-8529, 18-8554\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity:\u003c\/strong\u003e 1\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eUse with mounting kit 18-8529 (includes 18-0897 elbow gaskets) for direct mounting.\u003c\/li\u003e\n\u003cli\u003eUse with mounting kit 18-8554 together with manifold spacer 18-1908 when mounting to manifold 18-1953-2.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eNo OEM cross-reference numbers are listed for this specific part number.\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is the Sierra 18-1970-2?\u003c\/strong\u003e The Sierra 18-1970-2 is an exhaust riser elbow used on Mercruiser exhaust manifold setups, manufactured as a direct OE replacement for the original riser elbow it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-1970-2 come with gaskets?\u003c\/strong\u003e The riser elbow itself does not include gaskets, but mounting kit 18-8529 for the 18-1970-2 includes 18-0897 elbow gaskets needed for installation.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich mounting kit should I use with this riser elbow?\u003c\/strong\u003e Mounting kit 18-8529 is used to mount the 18-1970-2 directly and includes the 18-0897 elbow gaskets; mounting kit 18-8554 is used instead when installing the 18-1970-2 with manifold spacer 18-1908 onto manifold 18-1953-2.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-1970-2 riser elbow weigh?\u003c\/strong\u003e The Sierra 18-1970-2 exhaust riser elbow weighs 21.8 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color and finish does this part have?\u003c\/strong\u003e It has a white, primed and painted finish applied for added corrosion resistance and protection before installation.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-1970-2 a genuine Sierra part or aftermarket?\u003c\/strong\u003e The 18-1970-2 is a Sierra branded part manufactured as a direct OE replacement, fully interchangeable with the original equipment part it is designed to replace.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan this riser elbow be used with a manifold spacer?\u003c\/strong\u003e Yes, the 18-1970-2 can be paired with the 18-1908 manifold spacer when mounting kit 18-8554 is used, for installations on manifold 18-1953-2.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhere is the Sierra 18-1970-2 manufactured?\u003c\/strong\u003e The country of origin listed for this exhaust riser elbow is Taiwan.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included when I order the 18-1970-2?\u003c\/strong\u003e The package includes one 18-1970-2 exhaust riser elbow; mounting hardware and gaskets are supplied separately through the compatible mounting kits (18-8529 or 18-8554).\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the package dimensions of the 18-1970-2?\u003c\/strong\u003e The 18-1970-2 exhaust riser elbow ships in a package measuring 11 x 10.9 x 6.5 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-1970-2 fit any exhaust manifold?\u003c\/strong\u003e The 18-1970-2 is intended for Mercruiser exhaust manifold applications and, when used with mounting kit 18-8554 and spacer 18-1908, is compatible with manifold 18-1953-2.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs a UPC available for the Sierra 18-1970-2?\u003c\/strong\u003e Yes, the Sierra 18-1970-2 exhaust riser elbow carries UPC 808282374013.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988089647323,"sku":"SIE-18-1970-2","price":237.62,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/Untitled-1__78941.1772814308.500.750.jpg?v=1785188267"},{"product_id":"sierra-18-1976-2-manifold-exhaust-elbow-4in-hose-7-degree-down-angle-replaces-mercury-44354a3-fits-manifold-18-1957-2-mercruiser","title":"Sierra Manifold Elbow 18-1976-2, Replaces Mercury Marine 44354A3, 807914A1, Fits 18-1953-2 Manifold, 4 Inch Hose, 7 Degree Down Angle","description":"\u003cp\u003eThe Sierra 18-1976-2 Manifold Elbow is a 4 inch hose, 7 degree down angle exhaust manifold elbow built to fit the 18-1953-2 exhaust manifold. It directs exhaust flow from the manifold to the connected exhaust hose at the correct angle for proper drainage and reliable engine cooling water discharge, replacing worn or corroded factory elbows that can leak exhaust or coolant.\u003c\/p\u003e\u003cp\u003eThis elbow is a direct cross-reference for Mercury Marine 44354A3 and 807914A1, so it installs as a like-for-like replacement without modification. It is finished in black and is designed to pair with the correct elbow gasket for a sealed connection at the manifold. Sierra recommends using elbow gasket 18-2849-1 or 18-0897 with this elbow, and the matching 18-8505 mounting kit (sold separately) includes an 18-0897 elbow gasket specifically for use with this riser.\u003c\/p\u003e\u003cp\u003eEach unit ships as a single elbow (1 pack), intended for engine and drive system repair and maintenance work where the original manifold elbow has failed or is due for preventive replacement.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-1976-2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Manifold Elbow\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHose Connection Size:\u003c\/strong\u003e 4 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAngle:\u003c\/strong\u003e 7 degree down angle\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits Manifold:\u003c\/strong\u003e 18-1953-2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Elbow Gaskets:\u003c\/strong\u003e 18-2849-1, 18-0897\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e Black\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 25 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282325664\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack Quantity:\u003c\/strong\u003e 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Mercruiser Exhaust Manifolds\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eFits Manifold: 18-1953-2\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMercury Marine 44354A3\u003c\/li\u003e\n\u003cli\u003eMercury Marine 807914A1\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-1976-2 manifold elbow fit?\u003c\/strong\u003e The 18-1976-2 manifold elbow is designed to fit the 18-1953-2 exhaust manifold.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs 18-1976-2 a direct replacement for Mercury Marine 44354A3?\u003c\/strong\u003e Yes, 18-1976-2 directly cross-references to Mercury Marine part numbers 44354A3 and 807914A1.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat hose size does this elbow use?\u003c\/strong\u003e This manifold elbow is built for a 4 inch hose connection.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat angle is the 18-1976-2 elbow?\u003c\/strong\u003e It is a 7 degree down angle elbow, distinct from other Sierra manifold elbows offered at different angles.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-1976-2 manifold elbow weigh?\u003c\/strong\u003e The Sierra 18-1976-2 manifold elbow weighs 25 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat gasket should be used with the 18-1976-2 elbow?\u003c\/strong\u003e Elbow gasket 18-2849-1 or 18-0897 is compatible with the 18-1976-2 manifold elbow; the 18-8505 mounting kit for this riser also includes an 18-0897 gasket.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-1976-2 elbow come with mounting hardware?\u003c\/strong\u003e No, the 18-1976-2 is the elbow only; mounting hardware and gaskets are supplied separately in mounting kit 18-8505.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color is the Sierra 18-1976-2 manifold elbow?\u003c\/strong\u003e It is finished in black.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many elbows come in one order?\u003c\/strong\u003e Each order of the 18-1976-2 manifold elbow contains a single unit (1 pack).\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-1976-2 elbow genuine OEM or aftermarket?\u003c\/strong\u003e The 18-1976-2 is a Sierra-manufactured aftermarket part engineered to replace Mercury Marine 44354A3 and 807914A1.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the difference between 18-1976-2 and 18-1974-1?\u003c\/strong\u003e 18-1976-2 is a 4 inch hose, 7 degree down angle elbow for the 18-1953-2 manifold, while 18-1974-1 is a 3 inch hose, 0 degree down angle elbow for the same manifold; they use different mounting kits and are not interchangeable.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988089680091,"sku":"SIE-18-1976-2","price":208.09,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/sie-18-1976-2__30245.1727894429.500.750.jpg?v=1785189189"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/collections\/ATT-5640DC-1__06534.1780061517.500.750.jpg?v=1785359967","url":"https:\/\/www.goodvibesmarina.com\/collections\/gvcat-engine-parts-systems-exhaust-system.oembed?page=3","provider":"Good Vibes Marina","version":"1.0","type":"link"}