{"product_id":"sierra-18-0680-exhaust-manifold-gasket-for-mercruiser-3-0l-3-0lx-replaces-27-815528-omc-3853256","title":"Sierra 18-0680 Exhaust Manifold Gasket, Replaces 912164, Pack of 2","description":"\u003cp\u003eThe Sierra 18-0680 Exhaust Manifold Gasket is a replacement gasket engineered to seal the exhaust manifold joint on inboard and sterndrive engines, sealing against exhaust gas and coolant leakage at the manifold mating surface. It is built to meet or exceed the quality of the original equipment part it replaces, giving installers a dependable seal without the premium of a dealer-sourced OEM part. The gasket is round in shape and finished in white, and it ships as a pack of 2, which covers a typical single-manifold replacement or gives a spare on hand for a future service. Because exhaust manifold gaskets are compression-sealed and exposed to repeated heat cycling, they are a wear item that should be replaced any time the manifold is removed for service, rather than reused. This gasket carries the Sierra part number 18-0680 and directly replaces OEM number 912164, making it straightforward to identify against the number stamped on or referenced for the original gasket being removed. At 0.03 pounds, it is a lightweight, low-cost component that is inexpensive insurance against exhaust leaks compared to the labor cost of re-pulling a manifold to fix a failed seal.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-0680\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Exhaust Manifold Gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity:\u003c\/strong\u003e Pack of 2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e White\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShape:\u003c\/strong\u003e Round\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.03 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282105938\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e912164\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-0680 gasket fit?\u003c\/strong\u003e The 18-0680 is an exhaust manifold gasket that seals the manifold mating joint and directly replaces OEM number 912164.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs OEM part number 912164 the same as the Sierra 18-0680?\u003c\/strong\u003e Yes, Sierra 18-0680 is the direct replacement for OEM number 912164, so it can be ordered in place of that original part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many gaskets come in one package of 18-0680?\u003c\/strong\u003e Each package of the 18-0680 contains 2 exhaust manifold gaskets, enough for a manifold replacement plus a spare.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color is the 18-0680 exhaust manifold gasket?\u003c\/strong\u003e The 18-0680 gasket is white in color and round in shape.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-0680 gasket weigh?\u003c\/strong\u003e The 18-0680 exhaust manifold gasket weighs 0.03 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I reuse an old exhaust manifold gasket instead of buying the 18-0680?\u003c\/strong\u003e No, exhaust manifold gaskets like the 18-0680 are compression seals meant for one-time use; reusing a removed gasket often leads to leaks since it has already been crushed to seal the original joint.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-0680 genuine OEM or aftermarket?\u003c\/strong\u003e The 18-0680 is a Sierra-brand replacement gasket built to meet or exceed the original equipment part it replaces, rather than being sourced from the original engine manufacturer.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included when I order the 18-0680?\u003c\/strong\u003e An order of the Sierra 18-0680 includes a package of 2 exhaust manifold gaskets.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy does an exhaust manifold gasket need replacing?\u003c\/strong\u003e Exhaust manifold gaskets like the 18-0680 are subjected to repeated heat cycling and compression, which over time causes them to lose their seal and allow exhaust or coolant leakage at the manifold joint.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the Sierra 18-0680 gasket handle exhaust manifold heat cycling?\u003c\/strong\u003e Yes, the 18-0680 is designed as an exhaust manifold gasket, meaning it is built to seal against the repeated heat exposure at the manifold joint.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988085846235,"sku":"SIE-18-0680","price":16.69,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-0680_lg__46689.1558121722.500.750.jpg?v=1785188494","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-0680-exhaust-manifold-gasket-for-mercruiser-3-0l-3-0lx-replaces-27-815528-omc-3853256","provider":"Good Vibes Marina","version":"1.0","type":"link"}