{"product_id":"sierra-18-1952-1-marine-exhaust-manifold-replaces-mercruiser-99746a8-fits-gm-v-6-229-262-cid-1985-2002","title":"Sierra Exhaust Manifold 18-1952-1, Replaces Mercruiser 99746A8, Fits MCM GM V-6 229 and 262 cid Engines 1985-2002","description":"\u003cp\u003eThe Sierra 18-1952-1 is a direct-replacement exhaust manifold built for MCM GM V-6 229 and 262 cid engines (1985-2002). It is designed to fit either the port or starboard side of the engine, so a single part number covers both mounting positions. The manifold carries a machined exterior finish for a precise, reliable fit against the cylinder head and riser\/elbow assembly, and it is supplied with a mounting package to simplify installation.\u003c\/p\u003e\u003cp\u003eThis manifold cross-references directly to Mercruiser 99746A8, 99746A17, and 99746A3, along with equivalent aftermarket numbers, making it a straightforward swap when replacing a worn, cracked, or corroded factory manifold. Sierra manufactures this part to meet or exceed the specifications of the original equipment it replaces, giving boat owners a dependable option for keeping their exhaust system sealed and functioning correctly. At 34 pounds, it matches the weight profile of the OEM cast manifold it is designed to replace.\u003c\/p\u003e\u003cp\u003eBecause the manifold connects directly to the exhaust riser and elbow, it is commonly serviced alongside related components such as manifold gaskets, riser elbows, and mounting kits. Always confirm your engine's exact model and cid rating before ordering to ensure correct fitment.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-1952-1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 34 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExterior Finish:\u003c\/strong\u003e Machined\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting Position:\u003c\/strong\u003e Port and starboard\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine Fitment:\u003c\/strong\u003e MCM GM V-6 229 and 262 cid engines (1985-2002)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting Hardware:\u003c\/strong\u003e Supplied with mounting package\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282237448\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Mercruiser Exhaust Manifolds\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMCM GM V-6 229 and 262 cid engines (1985-2002)\u003c\/li\u003e\n\u003cli\u003eFits port and starboard mounting positions\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMercruiser 99746A8\u003c\/li\u003e\n\u003cli\u003eMercruiser 99746A17\u003c\/li\u003e\n\u003cli\u003eMercruiser 99746A3\u003c\/li\u003e\n\u003cli\u003eBarr MC-1-99746\u003c\/li\u003e\n\u003cli\u003eGLM 51220\u003c\/li\u003e\n\u003cli\u003eMallory 9-40505\u003c\/li\u003e\n\u003cli\u003eOsco 9745\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-1952-1 exhaust manifold fit?\u003c\/strong\u003e The 18-1952-1 fits MCM GM V-6 229 and 262 cid engines built between 1985 and 2002.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-1952-1 fit both the port and starboard side?\u003c\/strong\u003e Yes, this manifold is designed to fit either the port or starboard mounting position, so one part number covers both sides.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM Mercruiser part numbers does this manifold replace?\u003c\/strong\u003e The Sierra 18-1952-1 replaces Mercruiser 99746A8, 99746A17, and 99746A3.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAre there other aftermarket cross-reference numbers for this part?\u003c\/strong\u003e Yes, the 18-1952-1 also cross-references to Barr MC-1-99746, GLM 51220, Mallory 9-40505, and Osco 9745.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-1952-1 exhaust manifold weigh?\u003c\/strong\u003e It weighs 34 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat finish does the Sierra 18-1952-1 manifold have?\u003c\/strong\u003e It has a machined exterior finish for a precise fit against the cylinder head and riser assembly.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-1952-1 come with mounting hardware?\u003c\/strong\u003e Yes, the Sierra 18-1952-1 is supplied with a mounting package for installation.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-1952-1 a genuine Mercruiser part or an aftermarket equivalent?\u003c\/strong\u003e The 18-1952-1 is a Sierra-manufactured aftermarket manifold built to meet or exceed the specifications of the OEM Mercruiser 99746A8 and 99746A17 manifolds it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the 18-1952-1 work with my riser and elbow assembly?\u003c\/strong\u003e The 18-1952-1 manifold is compatible with standard riser elbow and gasket components used on MCM GM V-6 229 and 262 cid engine setups; confirm your specific riser and elbow part numbers before ordering.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the difference between the 18-1952-1 and a used OEM manifold?\u003c\/strong\u003e The 18-1952-1 is a new manifold manufactured to meet or exceed OEM specifications, offering consistent fit and finish compared to a used factory manifold that may show wear or corrosion.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDo I need to order a separate manifold for each side of the engine?\u003c\/strong\u003e No, because the 18-1952-1 fits either the port or starboard side, the same part number can be used on both sides of a V-6 engine that requires this manifold.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-1952-1 include the manifold gasket?\u003c\/strong\u003e The listing for 18-1952-1 confirms it ships with a mounting package; gaskets specific to your riser and elbow combination should be selected separately based on that hardware.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988089417947,"sku":"SIE-18-1952-1","price":354.57,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/Untitled-1__46118.1753840674.500.750.jpg?v=1785188893","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-1952-1-marine-exhaust-manifold-replaces-mercruiser-99746a8-fits-gm-v-6-229-262-cid-1985-2002","provider":"Good Vibes Marina","version":"1.0","type":"link"}