{"product_id":"exhaust-manifold-gasket-for-mercruiser-mcm-mie-gm-v-8-283-305-350-377-cid-replaces-barr-chv-47-000-27-33395-pack-of-2-sierra-18-2949-9","title":"Sierra 18-2949-9 Exhaust Manifold Gasket, Pack of 2, Replaces 96306, Fits MCM\/MIE GM V-8 283\/305\/350\/377 cid Engines","description":"\u003cp\u003eThe Sierra 18-2949-9 Exhaust Manifold Gasket is a direct-fit replacement gasket sold as a pack of 2, designed for MCM\/MIE GM V-8 engines in 283, 305, 350, and 377 cubic-inch displacement. It is built for use with the 18-1951-1 exhaust manifold, sealing the manifold-to-block joint to prevent exhaust and coolant leaks that can lead to overheating, corrosion, or engine damage if left unaddressed. Each gasket is manufactured to match OEM dimensions and sealing performance, giving a reliable fit without modification during manifold service or replacement.\u003c\/p\u003e\u003cp\u003eBecause exhaust manifold gaskets are wear items exposed to constant heat cycling and saltwater or freshwater cooling passages, replacing them with a properly sized gasket like the 18-2949-9 helps maintain a tight seal and supports long-term reliability of the exhaust system. The pack-of-2 quantity is convenient for servicing both sides of a V-8 manifold setup in a single order.\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 18-2949-9\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Exhaust Manifold 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 0.42 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine Fitment:\u003c\/strong\u003e MCM\/MIE GM V-8 283, 305, 350 and 377 cid engines\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManifold Fitment:\u003c\/strong\u003e 18-1951-1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross-Reference:\u003c\/strong\u003e 96306\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMCM\/MIE GM V-8 (283, 305, 350 and 377 cid) engines\u003c\/li\u003e\n\u003cli\u003eUse with exhaust manifold 18-1951-1\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e96306\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-2949-9 exhaust manifold gasket fit?\u003c\/strong\u003e The 18-2949-9 fits MCM\/MIE GM V-8 engines in 283, 305, 350, and 377 cubic-inch displacement.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many gaskets come in this package?\u003c\/strong\u003e The 18-2949-9 is sold as a pack of 2 exhaust manifold gaskets.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich exhaust manifold does this gasket work with?\u003c\/strong\u003e This gasket is designed for use with the 18-1951-1 exhaust manifold.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part number does the 18-2949-9 replace?\u003c\/strong\u003e It replaces OEM part number 96306.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-2949-9 gasket set weigh?\u003c\/strong\u003e The package weighs 0.42 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-2949-9 a direct OEM replacement?\u003c\/strong\u003e Yes, the Sierra 18-2949-9 is manufactured to match the original 96306 gasket for a direct-fit replacement.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDo I need one pack or two for a V-8 manifold job?\u003c\/strong\u003e One 18-2949-9 pack contains 2 gaskets, which covers a typical two-gasket manifold installation.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat happens if I do not replace a worn exhaust manifold gasket?\u003c\/strong\u003e A worn gasket at the manifold-to-block joint on a 283, 305, 350, or 377 cid GM V-8 can leak exhaust or coolant, so installing the 18-2949-9 during manifold service helps maintain a proper seal.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan this gasket be reused after removal?\u003c\/strong\u003e No, exhaust manifold gaskets like the 18-2949-9 are designed for one-time use and should be replaced with a new set anytime the manifold is removed.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-2949-9 suitable for both MCM and MIE engine configurations?\u003c\/strong\u003e Yes, it is designed to fit both MCM and MIE GM V-8 283, 305, 350, and 377 cid engines.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988135391451,"sku":"SIE-18-2949-9","price":26.78,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-2949-9__90740.1737827611.500.750.jpg?v=1785188004","url":"https:\/\/www.goodvibesmarina.com\/products\/exhaust-manifold-gasket-for-mercruiser-mcm-mie-gm-v-8-283-305-350-377-cid-replaces-barr-chv-47-000-27-33395-pack-of-2-sierra-18-2949-9","provider":"Good Vibes Marina","version":"1.0","type":"link"}