{"title":"Exhaust Elbows, Risers \u0026 Bellows","description":null,"products":[{"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":"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-18-0475-1-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-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":"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-18-0954-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-18-1845-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-18-1908-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-18-1935-1-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-18-1937-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":"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-18-1970-2-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-18-2537-marine-exhaust-leg-seal-replaces-oem-324937-rubber-package-of-2","title":"Sierra Exhaust Leg Seal 18-2537, Replaces 324937, Pack of 2","description":"\u003cp\u003eThe Sierra 18-2537 Exhaust Leg Seal is a round rubber seal used where the exhaust leg meets the engine or exhaust manifold on marine engines, sealing the joint to prevent exhaust and water leakage. It is sold as a package of 2 seals, so both required seals are included in a single purchase rather than needing to buy two separate packages. Sierra engineers this seal to meet or exceed the performance of the original equipment part it replaces, and it is built for the harsh marine environment where engines see sustained heat, vibration, and exposure to saltwater and moisture.\u003c\/p\u003e\u003cp\u003eThis exhaust leg seal directly replaces OEM part number 324937. Installers use it during exhaust leg or manifold service, gasket replacement, or general maintenance where the original seal has hardened, cracked, or begun to leak. As with all Sierra parts, it is manufactured to a consistent quality standard, and Sierra supplies OEM engine manufacturers and boat builders with parts of this type on a regular basis.\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 18-2537\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Name:\u003c\/strong\u003e Exhaust Leg Seal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity:\u003c\/strong\u003e 2 (sold as a package of 2)\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 Multi-coloured\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 030999752802\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eUniversal marine exhaust leg application; no specific make, horsepower, or model fitment is listed for this part.\u003c\/p\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e324937\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-2537 exhaust leg seal do?\u003c\/strong\u003e It seals the joint where the exhaust leg meets the engine or manifold on marine engines, preventing exhaust and water leakage at that connection.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many seals come in a package of 18-2537?\u003c\/strong\u003e Sierra part 18-2537 is sold as a package of 2 seals, not a single seal.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part number does 18-2537 replace?\u003c\/strong\u003e Sierra 18-2537 replaces OEM part number 324937.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-2537 exhaust leg seal weigh?\u003c\/strong\u003e The Sierra 18-2537 exhaust leg seal weighs 0.08 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat shape is the 18-2537 seal?\u003c\/strong\u003e The Sierra 18-2537 exhaust leg seal is round in shape.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color is the Sierra 18-2537 exhaust leg seal?\u003c\/strong\u003e It is listed as multi-coloured.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-2537 seal made of rubber?\u003c\/strong\u003e Yes, the 18-2537 is a rubber exhaust leg seal designed for marine engine applications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs Sierra 18-2537 an OEM or aftermarket part?\u003c\/strong\u003e The 18-2537 is a Sierra aftermarket part manufactured to meet or exceed the performance of the original equipment part it replaces, OEM number 324937.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen would I need to replace the 18-2537 exhaust leg seal?\u003c\/strong\u003e This seal is typically replaced during exhaust leg or manifold service, or general maintenance, when the original seal has hardened, cracked, or begun to leak.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-2537 seal fit a specific engine make or horsepower?\u003c\/strong\u003e No specific make, horsepower, or model fitment is listed for the Sierra 18-2537 exhaust leg seal.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for Sierra 18-2537?\u003c\/strong\u003e The UPC for the Sierra 18-2537 exhaust leg seal is 030999752802.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988106850523,"sku":"SIE-18-2537","price":8.28,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-2537_lg__18006.1558122657.500.750.jpg?v=1785188101"},{"product_id":"sierra-18-2727-exhaust-water-shutter-replaces-mercury-60930-mercruiser-water-shutter-exhaust-tubes","title":"Sierra Exhaust Water Shutter 18-2727, Replaces Mercury Marine 60930, White","description":"\u003cp\u003eThe Sierra 18-2727 is a round exhaust water shutter used in marine exhaust systems to control water flow through the exhaust path. It is a direct replacement for Mercury Marine part number 60930, letting boat owners restore proper exhaust water shutter function without sourcing a full Mercury Marine assembly. The shutter is finished in white and measures 0.25 inches thick, matching the dimensions of the original component it replaces. Each unit is sold individually and is built to the fit and function of the OEM part it is designed to replace.\u003c\/p\u003e\u003cp\u003eThis shutter is a straightforward maintenance-and-repair item for owners servicing the exhaust water system on applicable Mercury Marine-equipped boats. Because it is a direct OEM replacement for Mercury Marine 60930, installation follows the same procedure as removing and replacing the original shutter, with no modification required.\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 18-2727\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Exhaust Water Shutter\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\u003eItem Thickness:\u003c\/strong\u003e 0.25 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.14 pounds\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 808282111663\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eDirect OEM replacement for Mercury Marine part number 60930. Consult your engine owner's manual to confirm the original part number on your application before ordering.\u003c\/p\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e60930\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-2727 exhaust water shutter replace?\u003c\/strong\u003e It is a direct OEM replacement for Mercury Marine part number 60930.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color is the 18-2727 water shutter?\u003c\/strong\u003e It is white, matching the original Mercury Marine 60930 shutter it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow thick is the Sierra 18-2727 shutter?\u003c\/strong\u003e The shutter measures 0.25 inches thick.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat shape is the Sierra 18-2727 exhaust water shutter?\u003c\/strong\u003e It is round, the standard shape for this exhaust water shutter application.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-2727 shutter weigh?\u003c\/strong\u003e The Sierra 18-2727 weighs 0.14 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many shutters come in a package?\u003c\/strong\u003e The 18-2727 is sold as a single unit, with a unit count of 1.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the 18-2727 fit any boat with an exhaust water shutter?\u003c\/strong\u003e Confirm compatibility by checking whether your engine currently uses a Mercury Marine 60930 shutter; the Sierra 18-2727 is built as a direct replacement for that specific OEM part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-2727 a genuine Mercury Marine part or aftermarket?\u003c\/strong\u003e The 18-2727 is a Sierra-branded aftermarket part manufactured as a direct replacement for Mercury Marine 60930, not a Mercury Marine-branded original part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes installing the 18-2727 require any modification?\u003c\/strong\u003e No, the Sierra 18-2727 is designed as a direct fit replacement for Mercury Marine 60930, so no modification is needed during installation.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included when I order part 18-2727?\u003c\/strong\u003e One Sierra 18-2727 exhaust water shutter is included per order.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988109537499,"sku":"SIE-18-2727","price":29.84,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-2727_lg__66744.1558122993.500.750.jpg?v=1785188045"},{"product_id":"sierra-18-2746-exhaust-boot-4-lower-tube-replaces-mercruiser-32-14358-fits-gm-v-6-v-8-stern-drives","title":"Sierra 18-2746 Lower Exhaust Boot, 4 Inch Tube, Fits Mercruiser MCM GM V-6 \u0026 V-8 Engines, Replaces Mercury Marine 32-14358T","description":"\u003cp\u003eThe Sierra 18-2746 is a lower exhaust boot built for Mercruiser MCM stern drive installations powered by GM V-6 and V-8 engines. It connects the exhaust manifold or riser to the exhaust tube, sealing the joint against exhaust gas and water intrusion while absorbing the vibration and slight misalignment that occurs between rigid engine components and the drive system. The lower tube measures 4 inches (101.6mm), matching the factory exhaust tube diameter on applicable Mercruiser installations.\u003c\/p\u003e\u003cp\u003eSierra manufactures this exhaust boot to meet or exceed the performance of the original equipment part it replaces, and it is built to hold up to the heat, saltwater, and constant vibration of marine exhaust service. Sierra supplies parts to OEM engine manufacturers and boat builders, so the 18-2746 is engineered to the same fit and function standard as the factory boot it is designed to replace.\u003c\/p\u003e\u003cp\u003eThis exhaust boot is a direct fit for Mercruiser MCM GM V-6 and V-8 powered stern drive engines. Always confirm the 4 inch lower tube diameter matches your existing exhaust boot 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 18-2746\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Lower Exhaust Boot\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits:\u003c\/strong\u003e Mercruiser MCM GM V-6 \u0026amp; V-8 engines\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLower Tube Diameter:\u003c\/strong\u003e 4 inches (101.6mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.77 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Dimensions:\u003c\/strong\u003e 0.39 x 0.39 x 0.39 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999752949\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e Mercury Marine 32-14358T\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eMercruiser MCM GM V-6 \u0026amp; V-8 engines\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eMercury Marine 32-14358T\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-2746 exhaust boot fit?\u003c\/strong\u003e The Sierra 18-2746 is designed for Mercruiser MCM stern drive installations powered by GM V-6 and V-8 engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat size is the lower tube on this exhaust boot?\u003c\/strong\u003e The lower tube on the Sierra 18-2746 measures 4 inches, or 101.6mm, in diameter.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-2746 a direct replacement for the Mercury Marine 32-14358T?\u003c\/strong\u003e Yes, the Sierra 18-2746 is built to replace Mercury Marine part number 32-14358T and is engineered to meet or exceed the fit and function of the original part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-2746 exhaust boot weigh?\u003c\/strong\u003e It weighs 0.77 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-2746 an OEM part or an aftermarket replacement?\u003c\/strong\u003e The Sierra 18-2746 is an aftermarket exhaust boot manufactured by Sierra to meet or exceed the performance of the original equipment Mercury Marine part it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhere does the 18-2746 exhaust boot install on a Mercruiser stern drive?\u003c\/strong\u003e It fits in the lower exhaust tube section, connecting the exhaust path on Mercruiser MCM GM V-6 and V-8 engine installations.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-2746?\u003c\/strong\u003e The UPC for the Sierra 18-2746 exhaust boot is 030999752949.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the Sierra 18-2746 work with both V-6 and V-8 Mercruiser engines?\u003c\/strong\u003e Yes, the Sierra 18-2746 is listed to fit Mercruiser MCM GM V-6 and V-8 engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the product dimensions of the 18-2746 exhaust boot?\u003c\/strong\u003e The Sierra 18-2746 measures 0.39 x 0.39 x 0.39 inches as packaged.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy does the exhaust boot need to be replaced?\u003c\/strong\u003e Exhaust boots like the Sierra 18-2746 are exposed to constant heat, saltwater, and vibration, which over time can cause the original boot to crack, harden, or leak and require replacement.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes Sierra make quality parts comparable to OEM Mercury Marine components?\u003c\/strong\u003e Sierra supplies parts to OEM engine manufacturers and boat builders, and the 18-2746 exhaust boot is built to meet or exceed the original equipment part it replaces.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988109832411,"sku":"SIE-18-2746","price":41.38,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/Untitled-1__59246.1753731594.500.750.jpg?v=1785188315"},{"product_id":"sierra-18-2745-exhaust-boot-for-omc-stern-drive-replaces-omc-912374-fits-5-7l-7-5l-1986-later","title":"Sierra 18-2745 Exhaust Boot, Replaces 912374, Fits OMC Stern Drive 5.7L \u0026 7.5L 1986 \u0026 Later","description":"\u003cp\u003eThe Sierra 18-2745 Exhaust Boot is a replacement exhaust boot designed for use with OMC stern drives, specifically fitting 5.7L and 7.5L applications from 1986 and later. It is engineered as a direct replacement for the original equipment exhaust boot, sealing the connection point in the exhaust path to maintain a proper seal as exhaust gases exit the stern drive assembly. Each package includes one exhaust boot, making it a straightforward, single-part replacement for a worn, cracked, or deteriorated original boot.\u003c\/p\u003e\u003cp\u003eSierra states that each Sierra product meets or exceeds the original equipment part it replaces, and the 18-2745 is built to the fitment specifications of the OMC 912374 boot it is designed to replace. Because exhaust boots are fit specific, it is important to check part numbers against your stern drive's original component before ordering to ensure proper 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 18-2745\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Exhaust Boot\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eItem Dimensions:\u003c\/strong\u003e 4 x 4.75 x 4.75 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.88 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999752932\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity:\u003c\/strong\u003e 1 exhaust boot per package\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment:\u003c\/strong\u003e OMC stern drive 5.7L \u0026amp; 7.5L (1986 \u0026amp; later)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e Replaces 912374\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eOMC stern drive, 5.7L \u0026amp; 7.5L, 1986 \u0026amp; later\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e912374\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-2745 Exhaust Boot fit?\u003c\/strong\u003e It is designed for OMC stern drives with 5.7L and 7.5L engines, model year 1986 and later.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part number does the 18-2745 replace?\u003c\/strong\u003e The Sierra 18-2745 Exhaust Boot replaces OMC part number 912374.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many exhaust boots come in a package?\u003c\/strong\u003e One exhaust boot is included per package of the Sierra 18-2745.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-2745 an OEM part or an aftermarket replacement?\u003c\/strong\u003e It is an aftermarket replacement manufactured by Sierra, built to meet or exceed the original equipment exhaust boot it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of the 18-2745 exhaust boot?\u003c\/strong\u003e The boot measures 4 x 4.75 x 4.75 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-2745 Exhaust Boot weigh?\u003c\/strong\u003e It weighs 0.88 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the 18-2745 fit any OMC stern drive engine size?\u003c\/strong\u003e No, this exhaust boot is fit specific and is designed for 5.7L and 7.5L OMC stern drive engines from 1986 and later, so part numbers should be checked against the original component before ordering.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-2745 Exhaust Boot?\u003c\/strong\u003e The UPC for the Sierra 18-2745 Exhaust Boot is 030999752932.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhere is the exhaust boot installed on a stern drive?\u003c\/strong\u003e The 18-2745 exhaust boot is installed at the exhaust connection point on OMC stern drives with 5.7L and 7.5L engines to seal the exhaust path.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy replace a worn exhaust boot like the 18-2745?\u003c\/strong\u003e A cracked or deteriorated exhaust boot can leak, so replacing it with a properly fitted part like the Sierra 18-2745 helps maintain a sealed exhaust connection on compatible OMC stern drives.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes Sierra offer a warranty on the 18-2745 Exhaust Boot?\u003c\/strong\u003e Yes, the Sierra 18-2745 Exhaust Boot is covered by a limited warranty.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988109865179,"sku":"SIE-18-2745","price":34.7,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-2745_lg__48413.1558123991.500.750.jpg?v=1785188089"},{"product_id":"sierra-18-2750-exhaust-bellows-with-clamp-replaces-mercury-18654a1-32734a3-fits-mercruiser-mc-i-r-mr-alpha-one-gen-ii-bravo-blackhawk-vazer-1963-newer","title":"Sierra 18-2750 Exhaust Bellows, Replaces Mercury Marine 18654A1 32734A3, Fits Mercruiser Alpha One Gen II, Bravo I\/II\/III, Blackhawk","description":"\u003cp\u003eThe Sierra 18-2750 Exhaust Bellows is a round, clamp-on replacement bellows for Mercruiser sterndrive exhaust systems. It is used to seal the exhaust passage between the drive unit and the transom on applicable Mercruiser drives, and a mounting clamp is included so the bellows can be installed as a complete unit. The bellows measures 5.2 inches L x 3.8 inches W and weighs 0.44 pounds.\u003c\/p\u003e\u003cp\u003eThis part fits Mercruiser Alpha One Gen II drives from 1991 and newer (serial number 0D469859 and up), Mercruiser Bravo I\/II\/III drives from 1988 and newer (serial number 0B664190 and up), and Mercruiser Blackhawk drives from 1994-1995 (serial number 0F18677 and up). It is a direct equivalent for Mercury Marine part number 18654A1 and part number 32734A3, so it can be ordered as a like-for-like replacement using either of those reference numbers. As with other exhaust bellows, this component is a wear item that should be inspected periodically and replaced if it shows cracking, hardening, or splitting, since a failed exhaust bellows can allow water intrusion into the boat.\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 18-2750\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Mercruiser Bellows\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Dimensions:\u003c\/strong\u003e 5.2 inches L x 3.8 inches W\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.44 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShape:\u003c\/strong\u003e Round\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstallation Type:\u003c\/strong\u003e Clamp-On\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded Components:\u003c\/strong\u003e Exhaust Bellows, Clamp\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Equivalent Part Number:\u003c\/strong\u003e 32734A3, MERCURY MARINE 18654A1\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMercruiser Alpha One Gen II, 1991 and Newer, S\/N 0D469859 and Up\u003c\/li\u003e\n\u003cli\u003eMercruiser Bravo I\/II\/III, 1988 and Newer, S\/N 0B664190 and Up\u003c\/li\u003e\n\u003cli\u003eMercruiser Blackhawk, 1994-1995, S\/N 0F18677 and Up\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMercury Marine 18654A1\u003c\/li\u003e\n\u003cli\u003e32734A3\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-2750 exhaust bellows fit?\u003c\/strong\u003e The 18-2750 fits Mercruiser Alpha One Gen II drives from 1991 and newer (S\/N 0D469859 and up), Mercruiser Bravo I\/II\/III drives from 1988 and newer (S\/N 0B664190 and up), and Mercruiser Blackhawk drives from 1994-1995 (S\/N 0F18677 and up).\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-2750 a direct replacement for Mercury Marine 18654A1?\u003c\/strong\u003e Yes, part number 18-2750 is a direct equivalent for Mercury Marine 18654A1 and can be ordered in its place.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes 18-2750 cross-reference to 32734A3?\u003c\/strong\u003e Yes, 32734A3 is listed as an OEM equivalent number for the Sierra 18-2750 exhaust bellows.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of the 18-2750 exhaust bellows?\u003c\/strong\u003e This bellows measures 5.2 inches in length by 3.8 inches in width.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-2750 exhaust bellows weigh?\u003c\/strong\u003e The 18-2750 weighs 0.44 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-2750 come with a clamp?\u003c\/strong\u003e Yes, the Sierra 18-2750 exhaust bellows package includes a mounting clamp along with the bellows itself.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat shape is the 18-2750 exhaust bellows?\u003c\/strong\u003e The 18-2750 is a round exhaust bellows with a clamp-on installation design.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the 18-2750 fit an Alpha One Gen I drive?\u003c\/strong\u003e No, the 18-2750 is specified for Alpha One Gen II drives (1991 and newer, S\/N 0D469859 and up), not the earlier Gen I generation.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes 18-2750 fit Mercruiser Bravo III drives?\u003c\/strong\u003e Yes, 18-2750 is listed for Bravo I\/II\/III drives, 1988 and newer, S\/N 0B664190 and up.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat years of Blackhawk drives use the 18-2750 bellows?\u003c\/strong\u003e The 18-2750 fits Mercruiser Blackhawk drives built in 1994-1995, S\/N 0F18677 and up.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy would I need to replace an exhaust bellows like the 18-2750?\u003c\/strong\u003e An exhaust bellows seals the exhaust path on the sterndrive, and the 18-2750 should be replaced if the bellows shows cracking, hardening, or splitting to prevent water intrusion.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow is the 18-2750 exhaust bellows installed?\u003c\/strong\u003e The 18-2750 is a clamp-on bellows, using the included clamp to secure it in place on the applicable Mercruiser Alpha One Gen II, Bravo I\/II\/III, or Blackhawk drive.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988111241435,"sku":"SIE-18-2750","price":30.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/Untitled-1__06387.1772718313.500.750.jpg?v=1785188420"},{"product_id":"sierra-18-2748-exhaust-boot-4-id-replaces-mercruiser-32-44348t-fits-mercruiser-120-140-gm-v-6-v-8","title":"Sierra Exhaust Boot 18-2748, 4 Inch Upper Tube, Fits Mercruiser 120\/140 Stern Drive \u0026 GM V-6\/V-8 Engines","description":"\u003cp\u003eThe Sierra 18-2748 Exhaust Boot is a marine exhaust connector designed to link the exhaust riser to the exhaust hose on inboard\/outboard stern drive engines. It features a 4 inch upper tube (1016 millimeters) and is engineered for Mercruiser MCM 120 and 140 stern drives as well as GM V-6 and V-8 marine engines. This boot is intended for use with Sierra's 18-1975-1 Manifold Riser with Exhaust Tube, sealing the connection between the riser and the exhaust hose to prevent leaks of hot exhaust gas and water. Constructed with a bolt-on, round installation design, the boot ships one per package. Sierra manufactures this exhaust boot to meet or exceed the specifications of the original equipment part it replaces, making it a direct aftermarket replacement for Mercury Marine 32-44348T as well as GLM 89120, Mallory 9-72805, and Mercruiser Stern Drive 32-44348, 32-44348001, and 32-44348T. As with all Sierra marine parts, it is backed by Sierra's industry-leading customer satisfaction warranty. Boat owners and marine technicians running compatible Mercruiser stern drive or GM V-6\/V-8 setups can use this boot to restore a proper seal at the exhaust riser during routine maintenance or when replacing a cracked, hardened, or leaking original boot.\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 18-2748\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eItem Type:\u003c\/strong\u003e Exhaust Boot\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUpper Tube Diameter:\u003c\/strong\u003e 4 inches (1016 millimeters)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShape:\u003c\/strong\u003e Round\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstallation Type:\u003c\/strong\u003e Bolt-On\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Items:\u003c\/strong\u003e 1 exhaust boot per package\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.77 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999752963\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Equivalent Part Number:\u003c\/strong\u003e Mercury Marine 32-44348T\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross-Reference:\u003c\/strong\u003e GLM 89120, Mallory 9-72805, Mercruiser Stern Drive 32-44348, 32-44348001, 32-44348T\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUse With:\u003c\/strong\u003e Sierra 18-1975-1 Manifold Riser with Exhaust Tube\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMercruiser MCM 120 stern drive\u003c\/li\u003e\n\u003cli\u003eMercruiser MCM 140 stern drive\u003c\/li\u003e\n\u003cli\u003eGM V-6 and V-8 marine engines\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eGLM 89120\u003c\/li\u003e\n\u003cli\u003eMallory 9-72805\u003c\/li\u003e\n\u003cli\u003eMercruiser Stern Drive 32-44348\u003c\/li\u003e\n\u003cli\u003eMercruiser Stern Drive 32-44348001\u003c\/li\u003e\n\u003cli\u003eMercruiser Stern Drive 32-44348T\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-2748 exhaust boot fit?\u003c\/strong\u003e This exhaust boot is designed for Mercruiser MCM 120 and 140 stern drives as well as GM V-6 and V-8 marine engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat size is the upper tube on this exhaust boot?\u003c\/strong\u003e The upper tube on the 18-2748 measures 4 inches (1016 millimeters) in diameter.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-2748 a genuine Sierra part or aftermarket?\u003c\/strong\u003e It is a genuine Sierra part manufactured to meet or exceed the specifications of the original equipment part it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-2748 boot replace Mercury Marine 32-44348T?\u003c\/strong\u003e Yes, the 18-2748 is an equivalent replacement for Mercury Marine part number 32-44348T.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat other OEM part numbers does this boot cross-reference to?\u003c\/strong\u003e The 18-2748 crosses to GLM 89120, Mallory 9-72805, and Mercruiser Stern Drive numbers 32-44348, 32-44348001, and 32-44348T.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does this exhaust boot weigh?\u003c\/strong\u003e The Sierra 18-2748 exhaust boot weighs 0.77 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat other part does the 18-2748 boot install with?\u003c\/strong\u003e It is intended for use with Sierra's 18-1975-1 Manifold Riser with Exhaust Tube.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many exhaust boots come in the package?\u003c\/strong\u003e One exhaust boot is included per package for part number 18-2748.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the installation type for the 18-2748 boot?\u003c\/strong\u003e The 18-2748 uses a bolt-on, round installation design.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-2748 covered under warranty?\u003c\/strong\u003e Yes, this exhaust boot is covered under Sierra's customer satisfaction warranty like all Sierra marine parts.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy would I need to replace an exhaust boot like the 18-2748?\u003c\/strong\u003e Exhaust boots harden and crack with age and heat exposure, so a boot like the 18-2748 is typically replaced when the original seal at the exhaust riser starts leaking exhaust gas or water.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the manufacturer part number for this exhaust boot?\u003c\/strong\u003e The manufacturer part number is 18-2748.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988111339739,"sku":"SIE-18-2748","price":36.24,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/Untitled-1__70358.1753840675.500.750.jpg?v=1785188179"},{"product_id":"sierra-18-2758-exhaust-bellows-for-volvo-penta-aq200-290dp-replaces-875848-876631","title":"Sierra 18-2758 Exhaust Bellows, White, Fits Volvo AQ200 250 270 275 280 280DP 290 290DP, Replaces Volvo Penta 875848 876631","description":"\u003cp\u003eThe Sierra 18-2758 is a white exhaust bellows built for Volvo AQ200, 250, 270, 275, 280, 280DP, 290, and 290DP engines. The exhaust bellows connects the exhaust system to the outdrive, flexing with engine movement and steering while sealing exhaust gas and cooling water so they exit the drive without leaking into the bilge or engine compartment. Because the bellows works under constant heat, vibration, and saltwater or freshwater exposure, replacing a cracked or hardened bellows before it fails helps prevent water intrusion and exhaust leaks around the transom assembly.\u003c\/p\u003e\u003cp\u003eEach 18-2758 kit includes one bellows and two Sierra 18-710-52-2 hose clamps sized 2-13\/16 inches to 3-3\/4 inches, so the clamps needed to complete the installation are included in the box rather than sold separately. The bellows is built to meet or exceed the specification of the original equipment part it replaces, and it interchanges directly with the Volvo Penta, Mallory, and GLM part numbers listed below for the same application.\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 18-2758\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e White\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eItem Dimensions:\u003c\/strong\u003e 6 x 4.5 x 4.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 1.03 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Engines:\u003c\/strong\u003e Volvo AQ200, 250, 270, 275, 280, 280DP, 290, 290DP\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded Components:\u003c\/strong\u003e 1 exhaust bellows, 2 Sierra 18-710-52-2 hose clamps (2-13\/16 inches to 3-3\/4 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFit Type:\u003c\/strong\u003e Universal Fit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999312983\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eVolvo AQ200, 250, 270, 275, 280, 280DP, 290, 290DP engines\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eVolvo Penta 875848\u003c\/li\u003e\n\u003cli\u003eVolvo Penta 876631\u003c\/li\u003e\n\u003cli\u003eVolvo 875848-4\u003c\/li\u003e\n\u003cli\u003eMallory 9-72708\u003c\/li\u003e\n\u003cli\u003eGLM 89020\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-2758 exhaust bellows fit?\u003c\/strong\u003e The Sierra 18-2758 is designed for Volvo AQ200, 250, 270, 275, 280, 280DP, 290, and 290DP engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included with the 18-2758 bellows kit?\u003c\/strong\u003e One exhaust bellows and two Sierra 18-710-52-2 hose clamps, sized 2-13\/16 inches to 3-3\/4 inches, come included with the 18-2758.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-2758 cross-reference to a Volvo Penta part number?\u003c\/strong\u003e Yes, it interchanges with Volvo Penta 875848, Volvo Penta 876631, and Volvo 875848-4.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-2758 interchangeable with Mallory or GLM bellows?\u003c\/strong\u003e It also interchanges with Mallory 9-72708 and GLM 89020, so any of those part numbers point to the same bellows.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color is this bellows?\u003c\/strong\u003e The 18-2758 exhaust bellows is white.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of the 18-2758?\u003c\/strong\u003e It measures 6 x 4.5 x 4.5 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-2758 exhaust bellows weigh?\u003c\/strong\u003e 1.03 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDo I need to buy separate hose clamps for installation?\u003c\/strong\u003e No, two Sierra 18-710-52-2 hose clamps sized 2-13\/16 inches to 3-3\/4 inches are included with the 18-2758, so no additional clamps are required for the bellows connection.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-2758 a genuine part or an aftermarket copy?\u003c\/strong\u003e It is a genuine Sierra part, built to meet or exceed the specification of the original equipment bellows it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-2758 a universal-fit bellows or engine-specific?\u003c\/strong\u003e It is listed as a universal fit item, but it is specifically designed for the Volvo AQ200, 250, 270, 275, 280, 280DP, 290, and 290DP engine range.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the 18-2758 fit other Volvo engines not on the list?\u003c\/strong\u003e Fitment for the 18-2758 is confirmed for Volvo AQ200, 250, 270, 275, 280, 280DP, 290, and 290DP engines; other engines are not confirmed.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988111962331,"sku":"SIE-18-2758","price":79.35,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-2758_lg__16523.1558124696.500.750.jpg?v=1785188545"},{"product_id":"sierra-18-2764-exhaust-bellows-for-omc-sterndrive-cobra-replaces-omc-914036-volvo-3850426-2","title":"Sierra Exhaust Bellows 18-2764, Replaces OMC 911826, Fits All Cobra Sterndrive Models","description":"\u003cp\u003eThe Sierra 18-2764 is an exhaust bellows built as a direct replacement for OMC part number 911826, designed to fit all Cobra sterndrive models. The exhaust bellows is a core component of the sterndrive's exhaust bellows and transom seal system, and a worn or cracked bellows is a common point of failure that boat owners replace to keep the exhaust path sealed and functioning correctly. Sierra manufactures this bellows to match the fit and function of the original OMC component, giving Cobra sterndrive owners a straightforward like-for-like replacement.\u003c\/p\u003e\u003cp\u003eThis bellows has a machined exterior finish and measures 3.5 x 3.5 x 7.5 inches, weighing 0.96 pounds. It is sold as a standalone replacement part, ready to install in place of a failed or deteriorated original bellows on applicable Cobra sterndrive units.\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 18-2764\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e OMC Bellows \u0026amp; Transom Seal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 3.5 x 3.5 x 7.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.96 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Machined\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999313041\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e 911826\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment:\u003c\/strong\u003e All Cobra sterndrive models\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eAll Cobra sterndrive models\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eOMC 911826\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-2764 exhaust bellows fit?\u003c\/strong\u003e The Sierra 18-2764 exhaust bellows fits all Cobra sterndrive models.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part number does 18-2764 replace?\u003c\/strong\u003e It replaces OMC part number 911826, making the Sierra 18-2764 a direct cross-reference for that original component.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-2764 exhaust bellows an OEM or aftermarket part?\u003c\/strong\u003e It is an aftermarket replacement manufactured by Sierra, built to replace the original OMC 911826 bellows on Cobra sterndrive applications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of the Sierra 18-2764 exhaust bellows?\u003c\/strong\u003e It measures 3.5 x 3.5 x 7.5 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-2764 exhaust bellows weigh?\u003c\/strong\u003e 0.96 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat finish does the 18-2764 bellows have?\u003c\/strong\u003e It has a machined exterior finish.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat system does the 18-2764 bellows belong to?\u003c\/strong\u003e The Sierra 18-2764 is part of the exhaust bellows and transom seal system used on Cobra sterndrive units.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-2764 fit specific model years of Cobra sterndrive?\u003c\/strong\u003e The Sierra 18-2764 is listed as fitting all Cobra sterndrive models, without a specific year restriction.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included when ordering the 18-2764?\u003c\/strong\u003e The order includes one Sierra 18-2764 exhaust bellows.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow does the 18-2764 differ from the Sierra 18-1074 exhaust bellows?\u003c\/strong\u003e The Sierra 18-1074 exhaust bellows replaces OMC 914036 and is designated for clutch dog Cobra models (1986-93), while the 18-2764 replaces OMC 911826 and fits all Cobra sterndrive models, making them distinct SKUs for different applications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-2764 exhaust bellows?\u003c\/strong\u003e The UPC is 030999313041.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988112126171,"sku":"SIE-18-2764","price":34.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-2764_lg__89965.1558125125.500.750.jpg?v=1785188433"},{"product_id":"exhaust-elbow-gasket-replaces-27-39915-fits-sierra-18-1973-exhaust-elbow-2-pack","title":"Sierra Exhaust Elbow Gasket 18-2819-1-9, Replaces 27-39915, for Elbow 18-1973, Pack of 2","description":"\u003cp\u003eThe Sierra Exhaust Elbow Gasket 18-2819-1-9 is a two-piece pack of gaskets designed for use with exhaust elbow 18-1973. Each gasket is made from a stainless steel infused graphite material engineered for superior compressibility, helping the gasket seal effectively against the pressures and heat cycling found in a marine exhaust elbow joint. A tight, consistent seal at this connection point helps prevent exhaust leaks and the corrosion that can follow when combustion gases or water escape past a worn or hardened gasket.\u003c\/p\u003e\u003cp\u003eThis gasket is the component specified for elbow 18-1973 and is also included as part of mounting kit 18-8508. It corresponds to OEM reference number 27-39915, so it can be used as a direct replacement when that number is called for. Sierra backs this gasket with its standard product warranty, and each package contains two gaskets so a spare is on hand for the next service interval.\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 18-2819-1-9\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity:\u003c\/strong\u003e 2 (Pack of 2)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Stainless Steel Infused Graphite\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 0.04 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Dimensions:\u003c\/strong\u003e 1 centimeter L x 17.5 centimeters W x 17.7 centimeters H\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282369170\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Elbow:\u003c\/strong\u003e 18-1973\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded In Mounting Kit:\u003c\/strong\u003e 18-8508\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e 27-39915\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Taiwan\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eDesigned for use with exhaust elbow 18-1973 and included in mounting kit 18-8508.\u003c\/p\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e27-39915\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat elbow does the Sierra 18-2819-1-9 gasket fit?\u003c\/strong\u003e The 18-2819-1-9 gasket is designed for use with exhaust elbow 18-1973 and is also included in mounting kit 18-8508.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs 18-2819-1-9 the same as OEM part 27-39915?\u003c\/strong\u003e Yes, Sierra's 18-2819-1-9 elbow gasket corresponds to OEM cross-reference number 27-39915, so it can be installed as a replacement for that part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many gaskets come in a package of 18-2819-1-9?\u003c\/strong\u003e Each package contains 2 gaskets, so you get a spare for future service in addition to the one needed for the current job.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is the exhaust elbow gasket made from?\u003c\/strong\u003e It is made of a stainless steel infused graphite material, chosen for its compressibility and ability to seal well under exhaust heat and pressure.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat shape is the 18-2819-1-9 gasket?\u003c\/strong\u003e The gasket is round in shape, matching the mounting profile of exhaust elbow 18-1973.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-2819-1-9 gasket weigh?\u003c\/strong\u003e A package of the 18-2819-1-9 exhaust elbow gasket weighs 0.04 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan this gasket be used with the 18-8508 mounting kit?\u003c\/strong\u003e Yes, the 18-2819-1-9 gasket is the same elbow gasket included in Sierra's 18-8508 mounting kit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-2819-1-9 gasket genuine Sierra or aftermarket?\u003c\/strong\u003e It is a genuine Sierra part, backed by Sierra's product warranty, rather than a generic aftermarket substitute.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included when I order 18-2819-1-9?\u003c\/strong\u003e You receive a pack of 2 exhaust elbow gaskets, part number 18-2819-1-9, with no additional hardware included.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhere is the Sierra 18-2819-1-9 gasket manufactured?\u003c\/strong\u003e This gasket's country of origin is Taiwan.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988129853659,"sku":"SIE-18-2819-1-9","price":10.8,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/18-2819-1-9__90938.1558335092.500.750.jpg?v=1785187993"},{"product_id":"sierra-18-2833-9-exhaust-elbow-gasket-2-pack-replaces-mercruiser-27-997772-fits-mcm-120-140-3-0l-470-165-gm-ford-v-8","title":"Sierra 18-2833-9 Exhaust Elbow Gasket, Replaces 27-99777-2, Fits MCM 120\/140\/470\/GM V-8 Small Block\/Ford V-8, Pack of 2","description":"\u003cp\u003eThe Sierra 18-2833-9 Exhaust Elbow Gasket is a round replacement gasket sold in a pack of two for sealing the exhaust elbow-to-manifold joint on inboard and stern drive engines. It is a direct cross-reference to OEM gasket 27-99777-2 and is manufactured to meet or exceed the performance of the original equipment part it replaces, making it a reliable choice for routine exhaust system maintenance and elbow replacement.\u003c\/p\u003e\u003cp\u003eThis gasket is used with Sierra manifold elbows 18-1971 and 18-1978, and it is the same gasket included in the Sierra 18-4362 mounting kit. It is also the correct gasket for the 18-4008 block off plate used on manifolds 18-1958-1 and 18-1962-1, which requires two of these gaskets per installation. Because it ships as a pack of two, a single purchase covers both exhaust elbow gaskets needed for a complete job.\u003c\/p\u003e\u003cp\u003eThe 18-2833-9 gasket fits a broad range of marine engines, including Mercruiser MCM 120 (1993 and newer), 140\/3.0L, 470, and 165 in-line 6 cylinder engines, GM V-8 small block engines (1982 and older), and Ford V-8 engines. It weighs 0.08 pounds per pack and is backed by a 90-day Sierra 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 18-2833-9\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Exhaust Elbow Gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack Quantity:\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\u003eShape:\u003c\/strong\u003e Round\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282163402\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e 27-99777-2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Elbows:\u003c\/strong\u003e 18-1971, 18-1978\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Mounting Kit:\u003c\/strong\u003e 18-4362\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 90 days\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMercruiser MCM 120 (1993 and newer)\u003c\/li\u003e\n\u003cli\u003eMercruiser 140\/3.0L\u003c\/li\u003e\n\u003cli\u003eMercruiser 470\u003c\/li\u003e\n\u003cli\u003eMercruiser 165 in-line 6 cylinder\u003c\/li\u003e\n\u003cli\u003eGM V-8 small block (1982 and older)\u003c\/li\u003e\n\u003cli\u003eFord V-8 engines\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e27-99777-2\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-2833-9 exhaust elbow gasket fit?\u003c\/strong\u003e The Sierra 18-2833-9 exhaust elbow gasket fits Mercruiser MCM 120 (1993 and newer), 140\/3.0L, 470, and 165 in-line 6 cylinder engines, GM V-8 small block engines (1982 and older), and Ford V-8 engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many gaskets come in the package?\u003c\/strong\u003e This listing is sold as a pack of two 18-2833-9 elbow gaskets, enough to service both exhaust elbows in a typical installation.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part number does 18-2833-9 replace?\u003c\/strong\u003e 18-2833-9 is the direct cross-reference equivalent to OEM part 27-99777-2.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich exhaust elbows use this gasket?\u003c\/strong\u003e The 18-2833-9 gasket is used with Sierra manifold elbows 18-1971 and 18-1978, and it is also the gasket included in the 18-4362 mounting kit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this a genuine Sierra part or aftermarket?\u003c\/strong\u003e It is a genuine Sierra International part, manufactured to meet or exceed the performance of the original equipment gasket it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-2833-9 gasket weigh?\u003c\/strong\u003e The 18-2833-9 gasket pack weighs 0.08 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat shape is the gasket?\u003c\/strong\u003e The Sierra 18-2833-9 exhaust elbow gasket is round in shape.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the block off plate use this gasket too?\u003c\/strong\u003e Yes, the 18-4008 block off plate used with manifolds 18-1958-1 and 18-1962-1 requires two 18-2833 elbow gaskets, matching this part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the warranty on this gasket?\u003c\/strong\u003e Sierra backs the 18-2833-9 exhaust elbow gasket with a 90-day warranty.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-2833-9 gasket compatible with GM V-8 small block engines?\u003c\/strong\u003e Yes, the 18-2833-9 gasket fits GM V-8 small block engines built in 1982 and older.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988131262683,"sku":"SIE-18-2833-9","price":8.56,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/Sierra-18-2833-9-MerCruiser-Exhaust-Elbow-Gasket__20810.1737872629.500.750.jpg?v=1785189120"},{"product_id":"exhaust-elbow-riser-gasket-2-pack-for-sierra-center-riser-manifolds-replaces-barr-01-0107-fits-crusader-interceptor-mercury-omc","title":"Sierra Exhaust Elbow Gasket 18-2854-1-9, Open Riser Gasket, Replaces Barr 01-0107, Pack of 2","description":"\u003cp\u003eThe Sierra 18-2854-1-9 is an open-style exhaust elbow gasket sold in a pack of two, built to meet or exceed the quality of the original equipment part it replaces. It is designed for use with exhaust manifold and riser assemblies on Volvo Penta exhaust manifold systems, sealing the connection between the exhaust elbow and riser to prevent exhaust and water leaks at this joint.\u003c\/p\u003e\u003cp\u003eThis is the open-gasket configuration, distinct from the blocked-gasket version used on different riser setups. It is compatible with Sierra risers 18-1939, 18-1999, and 18-1907, and with Sierra manifold 18-1997-1. The gasket is also included as a component of the Sierra 18-4364 open-gasket mounting kit, so it can be sourced individually for a straightforward gasket-only replacement or as part of a complete mounting kit rebuild. Each pack of two lets you service a matched pair of risers or keep a spare on hand for future maintenance.\u003c\/p\u003e\u003cp\u003eRound in shape and silver in color, this gasket cross-references directly to Barr part number 01-0107, making it a straightforward drop-in replacement for boat owners and marine technicians who already run that 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 18-2854-1-9\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Exhaust Elbow Gasket (Open)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Volvo Penta Exhaust Manifolds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack Quantity:\u003c\/strong\u003e 2\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 Silver\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.09 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Risers:\u003c\/strong\u003e 18-1939, 18-1999, 18-1907\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Manifold:\u003c\/strong\u003e 18-1997-1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded In Mounting Kit:\u003c\/strong\u003e 18-4364 (open gasket)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282369200\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eUsed with Sierra exhaust risers 18-1939, 18-1999, and 18-1907\u003c\/li\u003e\n\u003cli\u003eUsed with Sierra exhaust manifold 18-1997-1\u003c\/li\u003e\n\u003cli\u003eIncluded component of Sierra mounting kit 18-4364 (open gasket configuration)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eBarr 01-0107\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-2854-1-9 gasket cross-reference to?\u003c\/strong\u003e It cross-references directly to Barr part number 01-0107, so it is a suitable equivalent for that part number.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many gaskets come in a pack?\u003c\/strong\u003e The Sierra 18-2854-1-9 is sold as a pack of two gaskets, enough to service a matched pair of exhaust risers in one order.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this the open or blocked gasket version?\u003c\/strong\u003e This is the open-gasket configuration. A separate blocked-gasket version exists under a different part number for riser setups that require a blocked gasket, so check which configuration your riser uses before ordering.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich risers is this gasket used with?\u003c\/strong\u003e The 18-2854-1-9 elbow gasket is used with Sierra risers 18-1939, 18-1999, and 18-1907.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich manifold does this gasket pair with?\u003c\/strong\u003e It is used with Sierra exhaust manifold 18-1997-1.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes this gasket come as part of a mounting kit?\u003c\/strong\u003e Yes, the 18-2854-1-9 gasket is included as a component of the Sierra 18-4364 mounting kit, which is the open-gasket kit version.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat shape and color is the gasket?\u003c\/strong\u003e The gasket is round in shape and silver in color.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the gasket weigh?\u003c\/strong\u003e The Sierra 18-2854-1-9 gasket weighs 0.09 pounds per package of two.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat type of engine or drive system is this gasket used on?\u003c\/strong\u003e This exhaust elbow gasket is intended for use on Volvo Penta exhaust manifold systems.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I buy just the gasket without the full mounting kit?\u003c\/strong\u003e Yes, the 18-2854-1-9 is sold individually as a two-pack gasket, separate from the full 18-4364 mounting kit that also includes it.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-2854-1-9 an OEM or aftermarket part?\u003c\/strong\u003e It is an aftermarket Sierra gasket manufactured to meet or exceed the quality of the original equipment part it replaces, cross-referencing to Barr 01-0107.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988132114651,"sku":"SIE-18-2854-1-9","price":15.73,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/sie-18-2854-9_large__07359.1653310937.500.750.jpg?v=1785187994"},{"product_id":"sierra-18-4364-exhaust-elbow-mounting-package-open-replaces-barr-20-0082-p-mallory-9-40171-includes-gasket-pipe-plug","title":"Sierra 18-4364 Exhaust Elbow Mounting Package, Open Gasket, Chrysler Inboard, Cross Reference BARR 20-0082-P","description":"\u003cp\u003eThe Sierra 18-4364 Exhaust Elbow Mounting Package is an open-gasket mounting kit for Chrysler inboard exhaust manifold systems. It is built for boats using an open (raw-water) cooling arrangement rather than a closed cooling system, and it is designed to be used together with 3 1\/2 inch manifold elbow risers 18-1999, 18-1907, and 18-1939. The package includes the 18-2854-1 3 inch elbow gasket (open) needed to seal the riser-to-manifold joint, plus a pipe plug, giving installers the gasket hardware required for a proper elbow reinstallation or riser swap without having to source the gasket separately.\u003c\/p\u003e\u003cp\u003eThis kit cross-references directly to BARR 20-0082-P, so it is a straightforward replacement for boats or engines originally fitted with that mounting package. Because the cooling configuration determines which gasket style is correct, buyers should confirm their system is open (raw-water) cooled before ordering this kit; boats with a closed cooling system instead require the blocked-gasket mounting package built around the 18-0476-1 elbow 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 18-4364\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Category:\u003c\/strong\u003e Chrysler Inboard Exhaust Manifold Mounting Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGasket Configuration:\u003c\/strong\u003e Open (for open\/raw-water cooling systems)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded Components:\u003c\/strong\u003e 18-2854-1 3 inch exhaust elbow gasket (open), pipe plug\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCross Reference:\u003c\/strong\u003e BARR 20-0082-P\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Manifold Elbow Risers:\u003c\/strong\u003e 18-1999, 18-1907, 18-1939\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Glass\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\u003ePackage Dimensions:\u003c\/strong\u003e 35.052 cm x 0.508 cm x 17.526 cm (H x L x W)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999754028\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eFor use with 3 1\/2 inch manifold elbow risers 18-1999, 18-1907, and 18-1939\u003c\/li\u003e\n\u003cli\u003eChrysler inboard exhaust manifold applications using an open (raw-water) cooling system\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eBARR 20-0082-P\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is included in the Sierra 18-4364 mounting package?\u003c\/strong\u003e The 18-4364 package includes the 18-2854-1 3 inch exhaust elbow gasket (open) and a pipe plug, giving you the gasket hardware needed to mount or reseal an open-cooling exhaust elbow.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-4364 kit for an open or closed cooling system?\u003c\/strong\u003e It is built for an open (raw-water) cooling system. Boats with a closed cooling system require the different blocked-gasket mounting package that uses the 18-0476-1 elbow gasket instead.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich manifold elbow risers does the 18-4364 work with?\u003c\/strong\u003e This mounting package is used with the 3 1\/2 inch manifold elbow risers 18-1999, 18-1907, and 18-1939.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes Sierra 18-4364 cross-reference to any other brand's part number?\u003c\/strong\u003e Yes, the 18-4364 mounting package cross-references to BARR 20-0082-P.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-4364 mounting package weigh?\u003c\/strong\u003e It weighs 0.33 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat gasket is used in the 18-4364 kit and what size is it?\u003c\/strong\u003e The 18-4364 package uses the 18-2854-1 gasket, a 3 inch open-style exhaust elbow gasket.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color is the Sierra 18-4364 gasket material?\u003c\/strong\u003e The gasket material included in the 18-4364 package is white.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan the 18-4364 be used with a blocked-style manifold elbow riser gasket setup?\u003c\/strong\u003e No. The 18-4364 is the open-gasket version; a blocked-gasket setup for closed cooling systems uses a separate mounting package built around the 18-0476-1 gasket instead.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat category of exhaust system is the 18-4364 designed for?\u003c\/strong\u003e It is listed under Chrysler inboard exhaust manifolds, for open-cooling manifold elbow riser installations.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-4364 package include a pipe plug?\u003c\/strong\u003e Yes, in addition to the 18-2854-1 exhaust elbow gasket, the 18-4364 mounting package includes a pipe plug.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the UPC for the Sierra 18-4364 mounting package listed anywhere?\u003c\/strong\u003e Yes, the UPC for the 18-4364 mounting package is 030999754028.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988194767067,"sku":"SIE-18-4364","price":16.24,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-4364_lg__57526.1558129228.500.750.jpg?v=1785188250"},{"product_id":"sierra-18-8507-exhaust-elbow-mounting-kit-for-omc-volvo-penta-gm-small-block-v8-305-350-cu-in","title":"Sierra Exhaust Elbow Mounting Kit 18-8507 for OMC Sterndrive\/Cobra Exhaust Elbow 18-1909-1","description":"\u003cp\u003eThe Sierra 18-8507 Exhaust Elbow Mounting Kit supplies the hardware needed to install or reseal the exhaust elbow on OMC Sterndrive\/Cobra I\/O cooling systems. It is designed for use with exhaust elbow 18-1909-1 and includes the 18-0943-2 elbow gasket, giving you the correct seal for a proper installation without having to source the gasket separately. This application is used on OMC\/Volvo GM small block V8 305-350 cubic inch engines.\u003c\/p\u003e\u003cp\u003eExhaust elbows direct spent exhaust gases and cooling water away from the engine, and the mounting kit ensures the elbow seats correctly against the manifold with a tight, leak-free seal. Using the correct gasket and hardware kit at reinstallation helps prevent exhaust leaks and water intrusion, both of which can cause serious engine damage in a marine cooling system. Sierra manufactures this kit to meet or exceed the performance of the original equipment part it replaces, and it is built for the corrosive, high-heat environment found in marine 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 18-8507\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Exhaust Elbow Mounting Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e OMC Sterndrive\/Cobra I\/O Cooling System\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine Compatibility:\u003c\/strong\u003e OMC\/Volvo GM Small Block V8 305-350 cuin\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Elbow:\u003c\/strong\u003e 18-1909-1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded Gasket:\u003c\/strong\u003e 18-0943-2 Elbow Gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.24 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282127046\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eOMC Sterndrive\/Cobra I\/O cooling systems using exhaust elbow 18-1909-1\u003c\/li\u003e\n\u003cli\u003eOMC\/Volvo GM small block V8 305-350 cubic inch engines\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is the Sierra 18-8507 Exhaust Elbow Mounting Kit used for?\u003c\/strong\u003e It provides the hardware and gasket needed to mount the exhaust elbow on OMC Sterndrive\/Cobra I\/O cooling systems, specifically for use with exhaust elbow 18-1909-1.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes this kit include the elbow gasket?\u003c\/strong\u003e Yes, the 18-8507 kit includes the 18-0943-2 elbow gasket, so you do not need to purchase the gasket separately for the elbow installation.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich elbow does the 18-8507 mounting kit fit?\u003c\/strong\u003e This kit is designed for use with exhaust elbow 18-1909-1 on OMC Sterndrive\/Cobra applications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat engines is the 18-8507 mounting kit compatible with?\u003c\/strong\u003e It is used on OMC\/Volvo GM small block V8 engines in the 305 to 350 cubic inch displacement range.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-8507 mounting kit weigh?\u003c\/strong\u003e The Sierra 18-8507 Exhaust Elbow Mounting Kit weighs 0.24 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this a genuine Sierra part?\u003c\/strong\u003e Yes, the 18-8507 is manufactured by Sierra and is built to meet or exceed the performance of the original equipment part it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included in the box with part number 18-8507?\u003c\/strong\u003e The kit includes the mounting hardware for the exhaust elbow along with the 18-0943-2 elbow gasket.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs a separate exhaust manifold gasket needed with this kit?\u003c\/strong\u003e No, the 18-8507 kit is specifically for mounting the exhaust elbow (18-1909-1) and includes the elbow gasket 18-0943-2; it does not include a manifold gasket.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the 18-8507 kit fit a Volvo Penta application?\u003c\/strong\u003e This kit applies to OMC\/Volvo GM small block V8 305-350 cuin engines in OMC Sterndrive\/Cobra I\/O cooling systems.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy is it important to replace the elbow gasket during this installation?\u003c\/strong\u003e A worn or improperly sealed gasket on the exhaust elbow can allow exhaust or water leaks, so the 18-0943-2 gasket included in kit 18-8507 ensures a proper seal when the elbow is mounted.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988433809627,"sku":"SIE-18-8507","price":26.42,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-8507_lg__80134.1558133321.500.750.jpg?v=1785188324"},{"product_id":"sierra-18-8523-exhaust-riser-mounting-kit-for-crusader-inboard-fits-4-riser-18-1927-oem-97772-riser","title":"Sierra Exhaust Elbow Mounting Kit 18-8523 for 18-1927 4 Inch Riser","description":"\u003cp\u003eThe Sierra Exhaust Elbow Mounting Kit, part number 18-8523, is a hardware kit designed to mount the Sierra 18-1927 4 inch exhaust riser. It supplies the mounting hardware and washer and nut kit needed to complete the riser installation, so the fasteners match the fit and finish of the riser they are paired with rather than relying on generic hardware.\u003c\/p\u003e\u003cp\u003eThis kit's washer and nut kit is a shared component also used across the Sierra 18-8515 and 18-8519 mounting kits, reflecting a common hardware standard across Sierra's riser and elbow mounting lineup. The kit ships in a compact package with an item weight of 0.24 pounds, and each set is packaged as a single unit count.\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 18-8523\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Exhaust Elbow Mounting Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUse With:\u003c\/strong\u003e Sierra 18-1927 4 inch Riser\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded Components:\u003c\/strong\u003e Mounting hardware, washer and nut kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e White\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\u003eWeight:\u003c\/strong\u003e 0.24 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit Count:\u003c\/strong\u003e 1\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eUse with Sierra 18-1927 4 inch riser\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eNo OEM cross-reference numbers listed\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is the Sierra 18-8523 mounting kit used for?\u003c\/strong\u003e It is a mounting kit used to install the Sierra 18-1927 4 inch exhaust riser, supplying the mounting hardware needed to fit the riser in place.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-8523 kit include hardware, or just the riser?\u003c\/strong\u003e The 18-8523 kit includes mounting hardware and a washer and nut kit; it does not include the riser itself, which is sold separately as Sierra part 18-1927.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich riser does the Sierra 18-8523 mounting kit fit?\u003c\/strong\u003e It is designed for use with the Sierra 18-1927 4 inch riser.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the washer and nut kit in 18-8523 unique to this kit?\u003c\/strong\u003e No, the washer and nut kit included in the 18-8523 mounting kit is also used in the Sierra 18-8515 and 18-8519 mounting kits.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-8523 mounting kit weigh?\u003c\/strong\u003e The 18-8523 mounting kit weighs 0.24 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of the Sierra 18-8523 mounting kit?\u003c\/strong\u003e The kit measures 0.39 x 0.39 x 0.39 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color is the Sierra 18-8523 mounting kit?\u003c\/strong\u003e The mounting hardware in the 18-8523 kit is white.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many mounting kits come in one 18-8523 package?\u003c\/strong\u003e One 18-8523 package contains a single unit count of the mounting kit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAre there OEM cross-reference numbers for the Sierra 18-8523 mounting kit?\u003c\/strong\u003e No OEM cross-reference numbers are listed for the 18-8523 mounting kit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs Sierra 18-8523 the same as the 18-8515 or 18-8519 mounting kits?\u003c\/strong\u003e No, 18-8523 is a distinct part number intended for the 18-1927 riser, while 18-8515 and 18-8519 are separate mounting kits for different elbows and risers, though they share the same washer and nut kit design.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDo I need any other parts to complete the riser installation with 18-8523?\u003c\/strong\u003e The 18-8523 kit provides the mounting hardware and washer and nut kit for the 18-1927 riser; the riser itself and any gaskets are separate Sierra parts.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988434006235,"sku":"SIE-18-8523","price":65.94,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-8523_lg__33458.1558131165.500.750.jpg?v=1785189162"},{"product_id":"sierra-18-8535-exhaust-elbow-mounting-kit-for-marine-inboard-exhaust-manifolds","title":"Sierra Exhaust Elbow Mounting Kit 18-8535, Blocked Gasket, Closed Cooling System, Fits Risers 18-1939, 18-1999, 18-1907","description":"\u003cp\u003eThe Sierra 18-8535 Exhaust Elbow Mounting Kit is a blocked-gasket mounting kit built for marine engines running a closed cooling system. It is used on Chrysler inboard exhaust manifold setups and installs with exhaust risers 18-1939, 18-1999, and 18-1907, making it a direct match for boats already running one of those risers. The kit includes the 18-0476-1 elbow gasket, the blocked-style gasket required for closed cooling systems, so the elbow-to-riser joint seals correctly without introducing raw water into a closed loop. Choosing the correct gasket type matters: an open-gasket kit is intended for open (raw water) cooling systems, while this 18-8535 kit's blocked gasket is specifically for closed systems, so installers should confirm their cooling configuration before ordering. The kit is compact and lightweight, finished in white, and is sized to drop into the existing elbow mounting hardware on compatible risers. It is sold as a complete small-parts kit rather than an individual gasket, so the correct blocked elbow gasket is on hand at install time instead of being sourced separately.\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 18-8535\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Exhaust Elbow Mounting Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGasket Type:\u003c\/strong\u003e Blocked (for closed cooling system)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded Gasket:\u003c\/strong\u003e 18-0476-1 Elbow Gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Risers:\u003c\/strong\u003e 18-1939, 18-1999, 18-1907\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Chrysler Inboard Exhaust Manifolds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e White\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\u003eWeight:\u003c\/strong\u003e 0.24 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282127275\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eUsed with exhaust risers 18-1939, 18-1999, and 18-1907\u003c\/li\u003e\n\u003cli\u003eFor Chrysler inboard exhaust manifolds with a closed cooling system\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 part number.\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is included in the Sierra 18-8535 Exhaust Elbow Mounting Kit?\u003c\/strong\u003e The 18-8535 kit includes the 18-0476-1 blocked elbow gasket, which is the gasket needed for a closed cooling system installation.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich exhaust risers is the 18-8535 mounting kit compatible with?\u003c\/strong\u003e This kit is used with exhaust risers 18-1939, 18-1999, and 18-1907.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-8535 kit for an open or closed cooling system?\u003c\/strong\u003e It is for a closed cooling system, since it includes the 18-0476-1 blocked-style elbow gasket rather than an open gasket.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the difference between the 18-8535 kit and an open-gasket mounting kit?\u003c\/strong\u003e The 18-8535 kit uses the blocked 18-0476-1 elbow gasket for closed cooling systems, while an open-gasket kit uses a different gasket for open (raw water) cooling systems and is a separate part number.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat engine application is the 18-8535 mounting kit designed for?\u003c\/strong\u003e It is designed for Chrysler inboard exhaust manifold setups that use one of the 18-1939, 18-1999, or 18-1907 risers.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color is the Sierra 18-8535 Exhaust Elbow Mounting Kit?\u003c\/strong\u003e The kit is finished in white.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-8535 Exhaust Elbow Mounting Kit weigh?\u003c\/strong\u003e It weighs 0.24 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of the 18-8535 kit?\u003c\/strong\u003e The kit measures 0.39 x 0.39 x 0.39 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-8535 kit come with mounting hardware or just the gasket?\u003c\/strong\u003e The 18-8535 is sold as a mounting kit built around the 18-0476-1 elbow gasket, rather than as a standalone gasket.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-8535 Exhaust Elbow Mounting Kit?\u003c\/strong\u003e The UPC is 808282127275.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAre there OEM cross-reference numbers for the 18-8535 kit?\u003c\/strong\u003e No OEM cross-reference numbers are listed for part number 18-8535.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan the 18-8535 kit be used with any exhaust riser?\u003c\/strong\u003e No, it is intended for use with risers 18-1939, 18-1999, and 18-1907 specifically.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988434137307,"sku":"SIE-18-8535","price":14.28,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-8535_lg__69437.1558131794.500.750.jpg?v=1785188403"},{"product_id":"exhaust-elbow-mounting-kit-for-mercruiser-gm-v6-v8-229-454-cid-fits-sierra-18-1976-2-elbow-replaces-mallory-9-40578-osco-4354-mk-sierra-18-8505","title":"Sierra 18-8505 Exhaust Elbow Mounting Kit for 18-1976-2 Riser - GM V-6\/V-8 229-454 CID Engines","description":"\u003cp\u003eThe Sierra 18-8505 Exhaust Elbow Mounting Kit supplies the hardware and gasket needed to mount Sierra's 18-1976-2 Manifold Elbow (4 inch hose, 7 degree down angle) to the exhaust manifold on GM-based sterndrive and inboard engines. Rather than a single loose bolt or gasket, the kit bundles the mounting bolt and a 18-0897 elbow gasket together so the elbow-to-manifold connection can be resealed and reinstalled as a complete assembly, which is the typical failure point when an exhaust elbow starts weeping water or exhaust at the manifold joint.\u003c\/p\u003e\u003cp\u003eThis kit is built for GM Big Block V-8 454 cubic inch engines (Models 330, 340 and 7.4L), GM Small Block V-8 305-350 cubic inch engines (Models 200, 228, 230, 260 and 898), and Mercruiser GM V-6 229 and 262 cubic inch engines (Models 185 and 205). It is designed to work specifically with the 18-1976-2 riser\/elbow, so confirm that part number is the elbow already installed on the engine before ordering. The kit is interchangeable with Mallory 9-40578 and Osco 4354-MK mounting kits, giving buyers a straightforward cross-reference if their old kit carries one of those numbers instead of a Sierra 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 18-8505\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Exhaust Elbow Mounting Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Riser\/Elbow:\u003c\/strong\u003e 18-1976-2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncludes:\u003c\/strong\u003e 18-0897 elbow gasket, mounting bolt, mounting hardware\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine Fitment:\u003c\/strong\u003e GM Big Block V-8 454 cubic inch (Models 330, 340, 7.4L); GM Small Block V-8 305-350 cubic inch (Models 200, 228, 230, 260, 898); Mercruiser GM V-6 229 and 262 cubic inch (Models 185, 205)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Machined\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Dimensions:\u003c\/strong\u003e 0.39 x 0.39 x 0.39 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.24 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282127039\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e Mallory 9-40578, Osco 4354-MK\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eGM Big Block V-8 454 cubic inch - Models 330, 340, 7.4L\u003c\/li\u003e\n\u003cli\u003eGM Small Block V-8 305-350 cubic inch - Models 200, 228, 230, 260, 898\u003c\/li\u003e\n\u003cli\u003eMercruiser GM V-6 229 and 262 cubic inch - Models 185, 205\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMallory 9-40578\u003c\/li\u003e\n\u003cli\u003eOsco 4354-MK\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is included in the Sierra 18-8505 mounting kit?\u003c\/strong\u003e The Sierra 18-8505 kit includes a 18-0897 elbow gasket along with the mounting bolt and hardware needed to attach the exhaust elbow to the manifold.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich exhaust elbow does the 18-8505 kit work with?\u003c\/strong\u003e It is designed for use with Sierra's 18-1976-2 Manifold Elbow, a 4 inch hose elbow with a 7 degree down angle.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-8505 kit fit small block and big block GM engines?\u003c\/strong\u003e Yes, the 18-8505 mounting kit fits GM Small Block V-8 305-350 cubic inch engines (Models 200, 228, 230, 260, 898) and GM Big Block V-8 454 cubic inch engines (Models 330, 340, 7.4L).\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the 18-8505 kit fit a Mercruiser V-6?\u003c\/strong\u003e Yes, it also fits Mercruiser GM V-6 229 and 262 cubic inch engines, Models 185 and 205.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-8505 kit interchangeable with any other brands?\u003c\/strong\u003e It is interchangeable with Mallory 9-40578 and Osco 4354-MK mounting kits, so either of those part numbers can be cross-referenced to the Sierra 18-8505.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-8505 mounting kit weigh?\u003c\/strong\u003e The Sierra 18-8505 Exhaust Elbow Mounting Kit weighs 0.24 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of the 18-8505 kit?\u003c\/strong\u003e Product dimensions for the Sierra 18-8505 kit are 0.39 x 0.39 x 0.39 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan this kit be used with a different riser than the 18-1976-2?\u003c\/strong\u003e The Sierra 18-8505 kit is built to use with the 18-1976-2 riser specifically; a different riser or elbow would require its own matching mounting kit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat finish does the mounting hardware have?\u003c\/strong\u003e The mounting kit hardware for part 18-8505 has a machined finish.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-8505 gasket reusable or should it be replaced during installation?\u003c\/strong\u003e The kit supplies a fresh 18-0897 elbow gasket, so it is meant to be installed new rather than reusing the old gasket when mounting the 18-1976-2 elbow.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988434202843,"sku":"SIE-18-8505","price":27.13,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-8505_lg__68928.1661520584.500.750.jpg?v=1785188198"},{"product_id":"exhaust-elbow-mounting-kit-18-8504-for-pleasurecraft-ford-small-block-v8-302-351-fits-18-1899-riser-replaces-osco-29001-mk-mallory-9-40871","title":"Sierra 18-8504 Exhaust Elbow Mounting Kit for 18-1899 Riser, PleasureCraft Ford Small Block V8 302\/351 CID","description":"\u003cp\u003eThe Sierra 18-8504 Exhaust Elbow Mounting Kit is the hardware set used to mount Sierra's 18-1899 exhaust riser (with 3 inch outlet) to the engine. It is built for PleasureCraft Ford Small Block V8 engines in the 302 and 351 CID range. The kit includes one Sierra 18-0677-1 exhaust elbow gasket along with the mounting hardware needed to complete the installation, so you are not left sourcing separate fasteners or gaskets to finish the job.\u003c\/p\u003e\u003cp\u003eThis kit is a companion part to the 18-1899 riser rather than a standalone riser or manifold, so it should be paired with that riser (or an existing riser of the same type) during installation. Sierra manufactures its exhaust components to meet or exceed the specifications of the original equipment parts they replace, giving boat owners a reliable way to reseal and remount their exhaust elbow without waiting on OEM lead times.\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 18-8504\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Exhaust Elbow Mounting Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncludes:\u003c\/strong\u003e 18-0677-1 Exhaust Elbow Gasket and mounting hardware\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUsed With:\u003c\/strong\u003e 18-1899 Riser (3 inch outlet)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine Fitment:\u003c\/strong\u003e PleasureCraft Ford Small Block V8 (302 and 351 CID) engines\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInterchangeable With:\u003c\/strong\u003e Mallory 9-40871, Osco 29001-MK\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 0.24 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Dimensions:\u003c\/strong\u003e 0.39 x 0.39 x 0.39 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282127022\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003ePleasureCraft Ford Small Block V8 (302 and 351 CID) engines\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMallory 9-40871\u003c\/li\u003e\n\u003cli\u003eOsco 29001-MK\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is included in the Sierra 18-8504 kit?\u003c\/strong\u003e The 18-8504 kit includes one Sierra 18-0677-1 exhaust elbow gasket plus the mounting hardware needed to install the exhaust elbow, so no separate gasket or fastener purchase is required.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the 18-8504 mounting kit fit?\u003c\/strong\u003e This kit is designed for PleasureCraft Ford Small Block V8 engines in the 302 and 351 CID displacement range.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich riser does the 18-8504 mounting kit go with?\u003c\/strong\u003e The 18-8504 kit is used with Sierra's 18-1899 riser, which has a 3 inch outlet.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-8504 interchangeable with other brands?\u003c\/strong\u003e Yes, the 18-8504 mounting kit is interchangeable with Mallory 9-40871 and Osco 29001-MK.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does the 18-8504 kit weigh?\u003c\/strong\u003e The Sierra 18-8504 Exhaust Elbow Mounting Kit weighs 0.24 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of the 18-8504 kit?\u003c\/strong\u003e The kit measures 0.39 x 0.39 x 0.39 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat finish does the 18-8504 hardware have?\u003c\/strong\u003e The mounting hardware in the 18-8504 kit has a machined finish.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-8504 kit include a manifold?\u003c\/strong\u003e No, the 18-8504 is a mounting kit for the 18-1899 riser; it does not include an exhaust manifold.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-8504 gasket the same as a genuine OEM gasket?\u003c\/strong\u003e Sierra manufactures the 18-0677-1 gasket included in the 18-8504 kit to meet or exceed the specifications of the original equipment part it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan the 18-8504 kit be used to reseal an existing riser installation?\u003c\/strong\u003e Yes, since it supplies the elbow gasket and mounting hardware for the 18-1899 riser, the 18-8504 kit can be used when remounting or resealing that riser on PleasureCraft Ford Small Block V8 302\/351 CID engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-8504 kit?\u003c\/strong\u003e The Sierra 18-8504 Exhaust Elbow Mounting Kit has UPC 808282127022.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988434268379,"sku":"SIE-18-8504","price":14.28,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-8504_lg__62816.1558133130.500.750.jpg?v=1785188555"},{"product_id":"sierra-18-8555-exhaust-elbow-mounting-kit-fits-18-1976-2-manifold-elbow-spacer-included-applications","title":"Sierra Exhaust Elbow Mounting Kit 18-8555 for Manifold Spacer 18-1908 with Riser 18-1976-2","description":"\u003cp\u003eThe Sierra Exhaust Elbow Mounting Kit, part number 18-8555, is a hardware kit designed for mounting an exhaust elbow to a manifold spacer on inboard and sterndrive marine exhaust systems. This kit is built for use with Manifold Spacer 18-1908 paired with Riser 18-1976-2, and it is also included as a component within kit 18-1908K for buyers assembling or servicing that larger configuration.\u003c\/p\u003e\u003cp\u003eInside the kit you get (1) each of two elbow gaskets: 18-2849-1 and 18-0897. These gaskets seal the mating surfaces between the exhaust elbow, manifold spacer, and riser, helping maintain a proper seal against exhaust leaks and water intrusion at the joint. Using the correct gasket set for your specific manifold spacer and riser combination is important, since Sierra offers several similar mounting kits paired with different spacer and riser part numbers.\u003c\/p\u003e\u003cp\u003eThis kit is intended for boat owners and marine technicians replacing worn or damaged elbow gaskets during routine exhaust system maintenance, or assembling a manifold spacer and riser setup from individual components. Always confirm your existing manifold spacer and riser part numbers before ordering to ensure kit 18-8555 is the correct match for your application.\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 18-8555\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Mounting Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Manifold Spacer:\u003c\/strong\u003e 18-1908\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Riser:\u003c\/strong\u003e 18-1976-2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded In Kit:\u003c\/strong\u003e 18-1908K\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKit Contents:\u003c\/strong\u003e (1) 18-2849-1 and 18-0897 elbow gaskets\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282145606\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 1.25 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Dimensions:\u003c\/strong\u003e 0.98 x 0.98 x 0.98 inches\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eUse with Manifold Spacer 18-1908 paired with Riser 18-1976-2\u003c\/li\u003e\n\u003cli\u003eIncluded as a component within kit 18-1908K\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is included in the Sierra 18-8555 Exhaust Elbow Mounting Kit?\u003c\/strong\u003e Kit 18-8555 includes one each of two elbow gaskets, part numbers 18-2849-1 and 18-0897, used to seal the exhaust elbow mounting joint.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat manifold spacer and riser does 18-8555 work with?\u003c\/strong\u003e The 18-8555 kit is designed for use with Manifold Spacer 18-1908 paired with Riser 18-1976-2.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs 18-8555 sold as part of a larger kit?\u003c\/strong\u003e Yes, the 18-8555 mounting kit is also included as a component within the larger 18-1908K kit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-8555 mounting kit weigh?\u003c\/strong\u003e The Sierra 18-8555 Exhaust Elbow Mounting Kit weighs 1.25 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of the 18-8555 kit packaging?\u003c\/strong\u003e The 18-8555 kit measures 0.98 x 0.98 x 0.98 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat brand makes part number 18-8555?\u003c\/strong\u003e Part number 18-8555 is manufactured by Sierra as an Exhaust Elbow Mounting Kit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-8555 kit include mounting hardware or only gaskets?\u003c\/strong\u003e The 18-8555 kit's documented contents are the two elbow gaskets, 18-2849-1 and 18-0897, used at the mounting joint.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow do I know if 18-8555 is the correct kit for my boat?\u003c\/strong\u003e Confirm that your exhaust system uses Manifold Spacer 18-1908 with Riser 18-1976-2, or that you are assembling kit 18-1908K, before ordering the 18-8555 mounting kit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-8555 kit?\u003c\/strong\u003e The UPC for the Sierra Exhaust Elbow Mounting Kit 18-8555 is 808282145606.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan the gaskets in kit 18-8555 be purchased separately?\u003c\/strong\u003e The 18-8555 kit bundles gaskets 18-2849-1 and 18-0897 together for the 18-1908 spacer and 18-1976-2 riser application rather than as individual replacement items.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988434333915,"sku":"SIE-18-8555","price":58.21,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-8555_lg__86875.1558132408.500.750.jpg?v=1785188120"},{"product_id":"sierra-18-8534-exhaust-elbow-mounting-kit-for-18-1921-manifold-elbow-omc-gm-v8-305-350-risers-1979-1989","title":"Sierra 18-8534 Exhaust Elbow Mounting Kit for OMC\/GM Small Block V8 305-350 CID Risers (1979-1989)","description":"\u003cp\u003eThe Sierra 18-8534 Exhaust Elbow Mounting Kit supplies the mounting hardware needed to install an exhaust elbow\/riser onto compatible marine engine manifolds. It is designed for OMC and GM small block V8 engines in the 305-350 cubic inch displacement range (1979-1989), and also has multiple applications for Ford and GM exhaust risers. The kit is built to be used with Sierra manifold part numbers 18-1902 and 18-1903, giving installers the correct hardware set to complete a riser or manifold replacement without hunting down individual bolts separately.\u003c\/p\u003e\u003cp\u003eLike other Sierra exhaust system components, this mounting kit is engineered to meet the demands of high horsepower marine engines and to hold up in the harsh marine environment, matching or exceeding the performance of the original equipment hardware it replaces. It ships as a compact, low weight hardware kit intended for straightforward bolt-in installation during exhaust manifold or riser 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 18-8534\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Exhaust Elbow Mounting Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUse With Manifold:\u003c\/strong\u003e 18-1902, 18-1903\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.24 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\u003eMaterial:\u003c\/strong\u003e Glass\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 808282127268\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eOMC\/GM Small Block V8 305-350 cubic inch engines (1979-1989)\u003c\/li\u003e\n\u003cli\u003eMultiple applications for Ford and GM exhaust risers\u003c\/li\u003e\n\u003cli\u003eUse with Sierra manifold 18-1902 or 18-1903\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eNo OEM cross-reference numbers listed\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is the Sierra 18-8534 Exhaust Elbow Mounting Kit used for?\u003c\/strong\u003e It supplies the mounting hardware needed to install an exhaust elbow or riser onto a compatible manifold, so it is used alongside a manifold replacement or riser service rather than sold as a standalone elbow.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the 18-8534 mounting kit fit?\u003c\/strong\u003e It fits OMC and GM small block V8 engines in the 305-350 cubic inch range from 1979-1989, and also has multiple applications for Ford and GM exhaust risers.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich manifolds is Sierra 18-8534 designed to work with?\u003c\/strong\u003e This mounting kit is intended for use with Sierra manifold part numbers 18-1902 and 18-1903.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-8534 mounting kit weigh?\u003c\/strong\u003e The Sierra 18-8534 Exhaust Elbow Mounting Kit weighs 0.24 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of this mounting kit?\u003c\/strong\u003e Item dimensions for the 18-8534 kit are 0.39 x 0.39 x 0.39 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is the Sierra 18-8534 kit made from?\u003c\/strong\u003e The kit's listed material is glass, and it is finished in white.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-8534 kit include mounting bolts?\u003c\/strong\u003e Yes, mounting bolts for the exhaust elbow are included as part of the Sierra 18-8534 kit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-8534 an OEM or aftermarket part?\u003c\/strong\u003e Sierra 18-8534 is a Sierra-brand replacement kit engineered to meet or exceed the performance of the original equipment hardware it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes Sierra 18-8534 come with a manifold gasket?\u003c\/strong\u003e No, the manifold gasket for this application is a separate part, Sierra 18-2949, which is not included in the 18-8534 mounting kit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-8534 mounting kit covered by a warranty?\u003c\/strong\u003e Yes, this kit is covered under Sierra's standard limited warranty like other Sierra marine parts.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988434628827,"sku":"SIE-18-8534","price":15.27,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-8534_lg__19175.1558131746.500.750.jpg?v=1785188501"},{"product_id":"sierra-18-8510-exhaust-elbow-riser-mounting-kit-for-omc-913784-volvo-3855270-risers-fits-gm-ford-center-rise-manifolds","title":"Sierra 18-8510 Exhaust Elbow Mounting Kit for Volvo GM Small Block V8 305-350 cu.in. AQ\/BB Series","description":"\u003cp\u003eThe Sierra 18-8510 Exhaust Elbow Mounting Kit is built for stern drive engines using the Volvo GM Small Block V8 305-350 cu.in. Platform, covering the AQ and BB series listed below. This kit supplies the hardware needed to mount the exhaust elbow to the engine, giving you a clean, correctly torqued installation without hunting down individual fasteners and gaskets piece by piece. It is designed to be used together with the matching exhaust riser, part number 18-1909-1, so the elbow-to-riser connection seals properly on reassembly.\u003c\/p\u003e\u003cp\u003eBecause this is a mounting kit rather than a single component, it is intended for engine rebuilds, exhaust system overhauls, and routine maintenance where the elbow is being removed, resealed, or replaced. Using the correct mounting kit for your specific engine family helps prevent exhaust leaks and water intrusion at the elbow joint, both of which can lead to more serious engine damage if left unaddressed. The kit carries Sierra part number 18-8510 and is identified by UPC 808282126902 for easy reordering.\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 18-8510\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Exhaust Elbow Mounting Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Engine:\u003c\/strong\u003e Volvo GM Small Block V8 305-350 cu.in.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Models:\u003c\/strong\u003e AQ and BB 200, 205, 211, 231, 225, 260, 271, 290, 311, 500, 501, 570, 571, 572\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUsed With Exhaust Riser:\u003c\/strong\u003e 18-1909-1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 34 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Dimensions:\u003c\/strong\u003e 0.39 x 0.39 x 0.39 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282126902\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eVolvo GM Small Block V8 305-350 cu.in. Engines\u003c\/li\u003e\n\u003cli\u003eModels: AQ and BB 200, 205, 211, 231, 225, 260, 271, 290, 311, 500, 501, 570, 571, 572\u003c\/li\u003e\n\u003cli\u003eUsed with exhaust riser 18-1909-1\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-8510 exhaust elbow mounting kit fit?\u003c\/strong\u003e It is built for the Volvo GM Small Block V8 305-350 cu.in. Engine family, covering the AQ and BB series models 200, 205, 211, 231, 225, 260, 271, 290, 311, 500, 501, 570, 571, and 572.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-8510 kit include the exhaust elbow itself?\u003c\/strong\u003e The Sierra 18-8510 is a mounting kit, meaning it provides the hardware to install the exhaust elbow rather than the elbow itself.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat riser is the 18-8510 mounting kit designed to be used with?\u003c\/strong\u003e Sierra 18-8510 is designed to be used together with exhaust riser part number 18-1909-1.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill 18-8510 work on a Volvo 4 cylinder B20 engine?\u003c\/strong\u003e No. The 18-8510 mounting kit is for the Volvo GM Small Block V8 305-350 cu.in. Engine models, not the 4 cylinder B20 engine, which uses a different mounting kit and riser.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs 18-8510 a genuine Sierra part number?\u003c\/strong\u003e Yes, 18-8510 is the Sierra manufacturer part number for this Exhaust Elbow Mounting Kit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-8510 exhaust elbow mounting kit weigh?\u003c\/strong\u003e The Sierra 18-8510 kit weighs 34 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat models are covered under the AQ and BB designations for this kit?\u003c\/strong\u003e The kit covers AQ and BB model numbers 200, 205, 211, 231, 225, 260, 271, 290, 311, 500, 501, 570, 571, and 572, all within the Volvo GM Small Block V8 305-350 cu.in. Platform.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I use 18-8510 with a different riser than 18-1909-1?\u003c\/strong\u003e The 18-8510 mounting kit is specified to be used with riser 18-1909-1 for proper fitment on the Volvo GM Small Block V8 305-350 cu.in. Engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-8510 mounting kit?\u003c\/strong\u003e The UPC for the Sierra 18-8510 Exhaust Elbow Mounting Kit is 808282126902.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this kit for a specific side of the engine, port or starboard?\u003c\/strong\u003e No side designation is specified for the Sierra 18-8510 Exhaust Elbow Mounting Kit; it applies to the Volvo GM Small Block V8 305-350 cu.in. Engine models listed.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen would I need to replace the exhaust elbow mounting hardware with kit 18-8510?\u003c\/strong\u003e This kit is typically needed during exhaust elbow removal, resealing, or replacement on Volvo GM Small Block V8 305-350 cu.in. Engines to ensure a proper, leak-free reinstallation.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988434825435,"sku":"SIE-18-8510","price":78.41,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-8510_lg__98255.1558133440.500.750.jpg?v=1785188100"},{"product_id":"marine-exhaust-riser-elbow-gasket-for-mercruiser-replaces-18-0897-fits-manifolds-18-1958-1-18-1962-1-with-risers-18-1971-18-1978","title":"EMP Exhaust Riser Gasket, Replaces Mercury 18-0897, Fits 18-1906 Manifold Spacer, 18-1971 and 18-1978 Risers","description":"\u003cp\u003eThe EMP 27-00524 is an exhaust riser gasket built as a direct replacement for the Mercury 18-0897 elbow gasket used in Mercruiser exhaust manifold assemblies. It seals the connection between the exhaust manifold riser and the manifold spacer, helping maintain a tight, leak-free joint that keeps exhaust gases and cooling water properly routed away from the engine. This gasket is matched to installations built around the 18-1906 manifold spacer paired with either the 18-1971 or 18-1978 exhaust riser, and it is one of the elbow gaskets found in the 18-8554 mounting kit configuration. At 0.042 pounds, it is a light, low-cost wear item that is typically replaced whenever the riser or manifold spacer is removed for service, since reusing an old gasket can lead to exhaust or water leaks at the joint. Boat owners servicing a Mercruiser exhaust system with this riser\/spacer combination can use the 27-00524 gasket to restore a proper seal without needing to source the original Mercury part number. Always confirm your exhaust assembly matches the 18-1906 spacer and 18-1971\/18-1978 riser configuration before ordering, since exhaust manifold gaskets are not universal across all riser and spacer combinations.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e EMP\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 27-00524\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 0.042 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 840080434155\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e 18-0897\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Manifold Spacer:\u003c\/strong\u003e 18-1906\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Exhaust Risers:\u003c\/strong\u003e 18-1971, 18-1978\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Mounting Kit:\u003c\/strong\u003e 18-8554\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eManifold Spacer 18-1906\u003c\/li\u003e\n\u003cli\u003eExhaust Riser 18-1971\u003c\/li\u003e\n\u003cli\u003eExhaust Riser 18-1978\u003c\/li\u003e\n\u003cli\u003eMounting Kit 18-8554\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e18-0897\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the EMP 27-00524 exhaust riser gasket replace?\u003c\/strong\u003e This gasket replaces Mercury part number 18-0897, an elbow gasket used in Mercruiser exhaust manifold assemblies.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich risers is the 27-00524 gasket designed to work with?\u003c\/strong\u003e It is designed for use with the 18-1971 and 18-1978 exhaust manifold risers.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes this gasket work with the 18-1906 manifold spacer?\u003c\/strong\u003e Yes, the EMP 27-00524 gasket is intended for use alongside the 18-1906 manifold spacer during riser installation.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this gasket part of a mounting kit?\u003c\/strong\u003e The 18-0897 gasket that the 27-00524 replaces is one of the elbow gaskets included in the 18-8554 mounting kit configuration.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 27-00524 exhaust riser gasket weigh?\u003c\/strong\u003e It weighs 0.042 pounds, making it a lightweight component for exhaust manifold servicing.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for this gasket?\u003c\/strong\u003e UPC 840080434155 identifies the EMP 27-00524 exhaust riser gasket.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 27-00524 gasket an OEM or aftermarket part?\u003c\/strong\u003e It is manufactured by EMP as a direct-fit replacement for the Mercury 18-0897 elbow gasket, not an original Mercury part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat category of engine does this gasket fit?\u003c\/strong\u003e The 27-00524 gasket is categorized for Mercruiser exhaust manifold applications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I use this gasket with just one riser, or does it need both 18-1971 and 18-1978?\u003c\/strong\u003e The 27-00524 gasket works with either the 18-1971 or the 18-1978 riser, since both use the same 18-0897 gasket it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat should I check before ordering the 27-00524 gasket?\u003c\/strong\u003e Confirm your exhaust assembly uses the 18-1906 manifold spacer with an 18-1971 or 18-1978 riser, since the 27-00524 gasket is matched to that configuration.\u003c\/p\u003e","brand":"EMP","offers":[{"title":"Default Title","offer_id":48991283708123,"sku":"EMP-27-00524","price":5.59,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/EMP_27-00524_Exhaust_Riser_Gasket__88971.1722356512.500.750.jpg?v=1785329103"},{"product_id":"exhaust-center-riser-elbow-57-57513-for-mercruiser-v6-v8-replaces-44354a3-807914a1-4in-hose-7-degree-down-angle","title":"Engineered Marine Products Exhaust Center Riser Elbow, Replaces 44354A3 807914A1, Fits V6\/V8 Manifold 18-1953-2, 4 Inch Hose 7 Degree","description":"\u003cp\u003eThis Engineered Marine Products exhaust center riser elbow is a manifold elbow designed for V6 and V8 marine engine exhaust systems. It connects to a 4 inch exhaust hose and is built with a 7 degree down angle to route exhaust gas and cooling water away from the manifold and out through the riser hose. The elbow has a machined exterior finish for a precise fit at the hose and manifold connection points.\u003c\/p\u003e\u003cp\u003eThis riser elbow fits Manifold 18-1953-2 and is compatible with elbow gaskets 18-2849-1 and 18-0897 for sealing the elbow-to-manifold connection. It directly replaces OEM numbers 44354A3 and 807914A1, making it a straightforward swap for boat owners rebuilding or upgrading their exhaust manifold system. As a wear and corrosion-prone component in the exhaust and cooling path, the riser elbow is a common replacement item during routine manifold maintenance or when addressing exhaust leaks and water intrusion.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Engineered Marine Products\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 57-57513\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHose Size:\u003c\/strong\u003e 4 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDown Angle:\u003c\/strong\u003e 7 degrees\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 Gasket:\u003c\/strong\u003e 18-2849-1, 18-0897\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine Compatibility:\u003c\/strong\u003e V6 and V8\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 22.93 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Dimensions:\u003c\/strong\u003e 14.37 x 7.48 x 6.69 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 840080499505\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eFits Manifold 18-1953-2\u003c\/li\u003e\n\u003cli\u003eV6 and V8 engines\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e44354A3\u003c\/li\u003e\n\u003cli\u003e807914A1\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Engineered Marine Products elbow (57-57513) replace?\u003c\/strong\u003e It directly replaces OEM numbers 44354A3 and 807914A1, so it can be used as a drop-in substitute for those original parts.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat manifold does this riser elbow fit?\u003c\/strong\u003e This elbow fits Manifold 18-1953-2 and is intended for use on V6 and V8 marine engine exhaust systems.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat hose size does the 57-57513 elbow use?\u003c\/strong\u003e The elbow is sized for a 4 inch exhaust hose connection.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat angle is the exhaust elbow?\u003c\/strong\u003e The 57-57513 riser elbow has a 7 degree down angle.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does this exhaust riser elbow weigh?\u003c\/strong\u003e The Engineered Marine Products elbow weighs 22.93 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of the 57-57513 elbow?\u003c\/strong\u003e It measures 14.37 x 7.48 x 6.69 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat gasket is used with this elbow?\u003c\/strong\u003e Elbow gaskets 18-2849-1 and 18-0897 are compatible with the 57-57513 riser elbow for sealing the manifold connection.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this elbow compatible with both V6 and V8 engines?\u003c\/strong\u003e Yes, the 57-57513 exhaust center riser elbow is designed to fit both V6 and V8 engine configurations.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat finish does the exhaust riser elbow have?\u003c\/strong\u003e The 57-57513 elbow has a machined exterior finish.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs a gasket included with the elbow?\u003c\/strong\u003e The elbow itself does not include a gasket; compatible gaskets 18-2849-1 and 18-0897 are used separately for the manifold connection.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan this elbow be used without a spacer?\u003c\/strong\u003e The 57-57513 elbow mounts to Manifold 18-1953-2 for a 4 inch hose, 7 degree down angle configuration.\u003c\/p\u003e","brand":"EMP","offers":[{"title":"Default Title","offer_id":48991291179227,"sku":"EMP-57-57513","price":197.27,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/EMP-57-57513-V6-V8-Exhaust-Center-Riser-Elbow__98008.1727190197.500.750.jpg?v=1785188904"},{"product_id":"emp-61-00500-exhaust-bellow-with-clamps-replaces-mercury-18654a1-fits-mercruiser-exhaust-systems-1963-newer","title":"EMP 61-00500 Exhaust Bellow with Clamps for MerCruiser Alpha One Gen II, Bravo I\/II\/III, Blackhawk - Replaces Mercury 18654A1, Sierra 18-2750","description":"\u003cp\u003eThe EMP 61-00500 Exhaust Bellow with Clamps is a replacement exhaust bellow assembly for MerCruiser sterndrive exhaust systems, supplied complete with clamps for a ready-to-install setup. The exhaust bellow forms the flexible connector between the engine's exhaust manifold and the drive unit, routing exhaust gases (and, on many installations, cooling water) through the transom while accommodating the movement of the drive as it trims and steers. Because this component sits in a wet, high-heat environment behind the transom, a worn, cracked, or split bellow is a common source of water intrusion into the bilge, making timely replacement important for keeping the boat dry and the engine bay protected.\u003c\/p\u003e\u003cp\u003eThe EMP 61-00500 is built as a direct equivalent to Sierra 18-2750 and is designed to fit a range of MerCruiser sterndrives, including Alpha One Gen II, Bravo I\/II\/III, and Blackhawk applications within the serial number ranges listed below. It replaces Mercury part number 18654A1 and cross-references to GLM 89100 and Mallory 9-72703. The kit includes the mounting clamps needed for installation, so no separate clamp purchase is required. This is a straightforward transom-area replacement part intended for boat owners and marine technicians performing routine exhaust bellow service or repairing a failed bellow.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e EMP\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 61-00500\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Exhaust Bellow with Clamps\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 840080473635\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.695 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Dimensions:\u003c\/strong\u003e 3.5 x 3.5 x 5.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncludes:\u003c\/strong\u003e Clamps\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e Mercury 18654A1, Sierra 18-2750, GLM 89100, Mallory 9-72703\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMerCruiser Alpha One Gen II, 1991 and newer, serial number 0D469859 and up\u003c\/li\u003e\n\u003cli\u003eMerCruiser Bravo I\/II\/III, 1988 and newer, serial number 0B664190 and up\u003c\/li\u003e\n\u003cli\u003eMerCruiser Blackhawk, 1994-1995, serial number 0F18677 and up\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMercury 18654A1\u003c\/li\u003e\n\u003cli\u003eSierra 18-2750\u003c\/li\u003e\n\u003cli\u003eGLM 89100\u003c\/li\u003e\n\u003cli\u003eMallory 9-72703\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the EMP 61-00500 exhaust bellow fit?\u003c\/strong\u003e The EMP 61-00500 fits MerCruiser Alpha One Gen II drives from 1991 and newer (serial number 0D469859 and up), Bravo I\/II\/III drives from 1988 and newer (serial number 0B664190 and up), and Blackhawk drives from 1994-1995 (serial number 0F18677 and up).\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the EMP 61-00500 the same as Sierra 18-2750?\u003c\/strong\u003e Yes, the EMP 61-00500 is a direct equivalent to Sierra part number 18-2750 and can be used as a replacement for it.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes this exhaust bellow replace a Mercury OEM part number?\u003c\/strong\u003e It replaces Mercury part number 18654A1, so it can be installed wherever that Mercury bellow is called for.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAre clamps included with the EMP 61-00500?\u003c\/strong\u003e Yes, the EMP 61-00500 Exhaust Bellow ships with clamps included, so no separate clamp purchase is needed for installation.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of the EMP 61-00500 exhaust bellow?\u003c\/strong\u003e The EMP 61-00500 measures 3.5 x 3.5 x 5.5 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the EMP 61-00500 weigh?\u003c\/strong\u003e The EMP 61-00500 Exhaust Bellow with Clamps weighs 0.695 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the EMP 61-00500 cross-reference to any other aftermarket brands?\u003c\/strong\u003e Yes, in addition to Sierra 18-2750, the EMP 61-00500 crosses to GLM 89100 and Mallory 9-72703.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the EMP 61-00500 fit a MerCruiser Bravo I drive?\u003c\/strong\u003e Yes, this bellow fits Bravo I, II, and III drives built 1988 and newer with serial number 0B664190 and up.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat symptom indicates this exhaust bellow needs replacing?\u003c\/strong\u003e A cracked, split, or deteriorated exhaust bellow can allow water into the bilge, which is the main reason boat owners replace a bellow like the EMP 61-00500.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the EMP 61-00500 fit a MerCruiser Blackhawk drive?\u003c\/strong\u003e Yes, it fits Blackhawk drives from 1994-1995 with serial number 0F18677 and up.\u003c\/p\u003e","brand":"EMP","offers":[{"title":"Default Title","offer_id":48991291244763,"sku":"EMP-61-00500","price":30.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/EMP_61-00500_MerCruiser_Exhaust_Bellow_with_Clamps__72546.1729003495.500.750.jpg?v=1785188535"},{"product_id":"61-01520-4-inch-engine-exhaust-bellow-replaces-18-2748-mercruiser-exhaust-riser-boot","title":"Engineered Marine Products 61-01520 4 Inch Engine Exhaust Bellow for Mercruiser Exhaust Systems","description":"\u003cp\u003eThe Engineered Marine Products 61-01520 is a 4 inch engine exhaust bellow built for use in Mercruiser exhaust systems. Positioned within the exhaust tube and water shutter section of the exhaust path, the bellow's flexible, ribbed construction absorbs engine movement and vibration while maintaining a sealed connection between exhaust components, helping route exhaust gas and cooling water away from the engine without leaks. It is a direct replacement for a worn, cracked, or hardened original bellow, restoring a tight seal in the exhaust run.\u003c\/p\u003e\u003cp\u003eMeasuring 12 inches by 8 inches by 1 inch and weighing 0.71 pounds, the 61-01520 is sized to match the dimensions of the exhaust tube section it services. It is identified by UPC 840080406084 for straightforward ordering and inventory matching. As an Engineered Marine Products part, it is manufactured to fit the exhaust bellow application in Mercruiser water shutter and exhaust tube systems, giving boat owners and marine technicians a reliable part number to reference when sourcing a replacement bellow.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Engineered Marine Products\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 61-01520\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Engine Exhaust Bellow\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDiameter:\u003c\/strong\u003e 4 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e 12 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth:\u003c\/strong\u003e 8 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeight:\u003c\/strong\u003e 1 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.71 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 840080406084\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eDesigned for use in Mercruiser exhaust systems as part of the water shutter and exhaust tube category.\u003c\/p\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cp\u003eNo OEM cross-reference numbers are specified for this part.\u003c\/p\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is the Engineered Marine Products 61-01520 used for?\u003c\/strong\u003e It is a 4 inch engine exhaust bellow that creates a flexible, sealed connection within a Mercruiser exhaust system, absorbing engine movement while routing exhaust gas and cooling water away from the engine.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of this exhaust bellow?\u003c\/strong\u003e The 61-01520 measures 12 inches by 8 inches by 1 inch.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 61-01520 exhaust bellow weigh?\u003c\/strong\u003e It weighs 0.71 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat size exhaust bellow is the 61-01520?\u003c\/strong\u003e It is a 4 inch engine exhaust bellow, sized for a 4 inch exhaust connection.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 61-01520 a genuine Engineered Marine Products part?\u003c\/strong\u003e Yes, the 61-01520 is manufactured by Engineered Marine Products and identified by UPC 840080406084.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat engines or systems is this bellow designed for?\u003c\/strong\u003e The 61-01520 is designed for use in Mercruiser exhaust systems, within the water shutter and exhaust tube category.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan the 61-01520 replace a cracked or worn exhaust bellow?\u003c\/strong\u003e Yes, this bellow is intended as a replacement part for a deteriorated exhaust bellow in a Mercruiser exhaust system, restoring a sealed connection.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy does an exhaust bellow need to be flexible?\u003c\/strong\u003e A bellow's ribbed, flexible design, as used in the 61-01520, allows it to absorb engine vibration and movement while keeping the exhaust connection sealed.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat comes with the 61-01520 exhaust bellow?\u003c\/strong\u003e The 61-01520 is the 4 inch engine exhaust bellow itself, identified by UPC 840080406084.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow is the 61-01520 identified for ordering?\u003c\/strong\u003e Order it using manufacturer part number 61-01520 or UPC 840080406084.\u003c\/p\u003e","brand":"EMP","offers":[{"title":"Default Title","offer_id":48991291277531,"sku":"EMP-61-01520","price":44.79,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/EMP_61-01520_MerCruiser_Engine_Exhaust_Bellow__83998.1722352979.500.750.jpg?v=1785188929"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/collections\/EMP_61-01520_MerCruiser_Engine_Exhaust_Bellow__83998.1722352979.500.750.jpg?v=1785356948","url":"https:\/\/www.goodvibesmarina.com\/collections\/gvcat-engine-parts-systems-exhaust-system-exhaust-elbows-risers-bellows.oembed","provider":"Good Vibes Marina","version":"1.0","type":"link"}