{"product_id":"sierra-18-1998-1-exhaust-manifold-replaces-barr-fm-1-83-universal-center-riser-for-crusader-302-351-cid-port-starboard","title":"Sierra 18-1998-1 Exhaust Manifold, White, Cross-Reference Barr FM-1-83","description":"\u003cp\u003eThe Sierra 18-1998-1 is a marine exhaust manifold finished in white with a machined exterior, engineered as a direct replacement for worn or corroded factory manifolds. Exhaust manifolds route hot exhaust gases away from the engine block while a surrounding water jacket cools the exhaust and the engine, and a compromised manifold can lead to overheating, exhaust leaks, or water intrusion into the engine. The Sierra 18-1998-1 is built to restore that cooling and exhaust path with OEM-equivalent fit and function.\u003c\/p\u003e\u003cp\u003eThis manifold is designed to work with the Sierra 18-2854-1 elbow gasket for open riser setups or the 18-0476-1 elbow gasket for blocked riser setups, and pairs with the Sierra 18-1949 manifold spacer. It is cross-referenced to Barr FM-1-83, FM183, GLM 56250, Mallory 9-40111, Osco FL994, and Osco FLCR818, making it a suitable replacement wherever those part numbers are specified. The kit includes an exhaust elbow gasket, an 18-0183-1 exhaust manifold gasket, and an 18-4258 pipe plug, giving installers the gaskets and hardware needed to complete the swap without sourcing separate gasket kits.\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 18-1998-1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Exhaust Manifold\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e White\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExterior Finish:\u003c\/strong\u003e Machined\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 36.11 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 808282243340\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e PleasureCraft Exhaust Manifolds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Riser Gasket (Open):\u003c\/strong\u003e 18-2854-1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Riser Gasket (Blocked):\u003c\/strong\u003e 18-0476-1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Manifold Spacer:\u003c\/strong\u003e 18-1949\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKit Contents:\u003c\/strong\u003e Exhaust elbow gasket, 18-0183-1 exhaust manifold gasket, 18-4258 pipe plug\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eBarr FM-1-83\u003c\/li\u003e\n\u003cli\u003eFM183\u003c\/li\u003e\n\u003cli\u003eGLM 56250\u003c\/li\u003e\n\u003cli\u003eMallory 9-40111\u003c\/li\u003e\n\u003cli\u003eOsco FL994\u003c\/li\u003e\n\u003cli\u003eFLCR818\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-1998-1 manifold replace?\u003c\/strong\u003e The Sierra 18-1998-1 exhaust manifold is cross-referenced to Barr FM-1-83, FM183, GLM 56250, Mallory 9-40111, Osco FL994, and FLCR818, so any of those part numbers can be replaced with this manifold.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color and finish does this manifold come in?\u003c\/strong\u003e It comes in white with a machined exterior finish.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-1998-1 weigh?\u003c\/strong\u003e The manifold weighs 36.11 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat gaskets are needed to install the 18-1998-1 manifold?\u003c\/strong\u003e Use the Sierra 18-2854-1 elbow gasket for an open riser setup or the 18-0476-1 elbow gasket for a blocked riser setup with the 18-1998-1 manifold.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the manifold come with any gaskets or hardware included?\u003c\/strong\u003e Yes, the 18-1998-1 kit includes an exhaust elbow gasket, an 18-0183-1 exhaust manifold gasket, and an 18-4258 pipe plug.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs a manifold spacer required with this part?\u003c\/strong\u003e The 18-1998-1 manifold is designed to work with the Sierra 18-1949 manifold spacer.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-1998-1 an OEM or aftermarket part?\u003c\/strong\u003e The 18-1998-1 is a Sierra-manufactured manifold built as a direct cross-reference replacement for Barr FM-1-83 and the other listed OEM equivalents, rather than a part sourced from the original engine builder.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the exhaust elbow gasket used with the 18-1998-1 called?\u003c\/strong\u003e The open-configuration elbow gasket paired with the 18-1998-1 manifold is the 18-2854-1; the blocked-configuration version is the 18-0476-1.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan this manifold be used with a blocked riser configuration?\u003c\/strong\u003e Yes, when running a blocked riser setup, pair the 18-1998-1 manifold with the 18-0476-1 elbow gasket instead of the open-configuration 18-2854-1.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the listed dimensions of the 18-1998-1 manifold package?\u003c\/strong\u003e The Sierra 18-1998-1 is listed at 0.39 x 0.39 x 0.39 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat UPC is associated with the Sierra 18-1998-1 manifold?\u003c\/strong\u003e The UPC for the Sierra 18-1998-1 manifold is 808282243340.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988090237147,"sku":"SIE-18-1998-1","price":378.01,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/18-1998-1__48585.1722518483.500.750.jpg?v=1785189121","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-1998-1-exhaust-manifold-replaces-barr-fm-1-83-universal-center-riser-for-crusader-302-351-cid-port-starboard","provider":"Good Vibes Marina","version":"1.0","type":"link"}