{"product_id":"sierra-18-1931-1-exhaust-manifold-replaces-volvo-penta-835804-856883-omc-volvo-gm-small-block-v8-305-350-1979-89","title":"Sierra 18-1931-1 Manifold, Replaces Volvo Penta 835804-6 and 856883-4","description":"\u003cp\u003eThe Sierra 18-1931-1 is an exhaust manifold built for Volvo Penta stern drive and inboard applications, engineered to meet or exceed the quality of the original equipment part it replaces. The manifold carries a machined exterior finish and is manufactured to the fit and function of the OEM component it is designed to replace, making it a direct swap for boat owners dealing with a cracked, corroded, or leaking factory manifold.\u003c\/p\u003e\u003cp\u003eExhaust manifolds route hot exhaust gases away from the engine while the surrounding water jacket cools the exhaust before it exits the boat, so the integrity of this component is critical to both engine cooling and safe exhaust handling. The Sierra 18-1931-1 is designed as a like-for-like replacement, and Sierra also offers matching mounting hardware kits engineered specifically for use with this manifold, simplifying installation for anyone replacing a worn unit.\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 18-1931-1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Exhaust Manifold\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Volvo Penta Exhaust Manifolds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 47 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Dimensions:\u003c\/strong\u003e 25.9 x 10.4 x 9.6 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 808282237431\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Mounting Kits:\u003c\/strong\u003e Sierra 18-8511, Sierra 18-8502\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eDesigned for Volvo Penta exhaust manifold applications.\u003c\/li\u003e\n\u003cli\u003eCompatible with Sierra 18-8511 and Sierra 18-8502 mounting kits, both of which are designed for use with the 18-1931-1 manifold.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eGLM 51630\u003c\/li\u003e\n\u003cli\u003eMallory 9-40901\u003c\/li\u003e\n\u003cli\u003eOsco 5805\u003c\/li\u003e\n\u003cli\u003eVolvo Penta 835804\u003c\/li\u003e\n\u003cli\u003eVolvo Penta 856883\u003c\/li\u003e\n\u003cli\u003eVolvo Penta 835804-6\u003c\/li\u003e\n\u003cli\u003eVolvo Penta 856883-4\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-1931-1 replace?\u003c\/strong\u003e The Sierra 18-1931-1 manifold is interchangeable with GLM 51630, Mallory 9-40901, Osco 5805, Volvo Penta 835804, Volvo Penta 856883, Volvo Penta 835804-6, and Volvo Penta 856883-4.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this manifold a genuine Sierra part or a generic aftermarket copy?\u003c\/strong\u003e It is a genuine Sierra-branded manifold, part number 18-1931-1, built to meet or exceed the quality of the original equipment part it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of the 18-1931-1 manifold?\u003c\/strong\u003e The Sierra 18-1931-1 measures 25.9 x 10.4 x 9.6 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-1931-1 manifold weigh?\u003c\/strong\u003e This manifold weighs 47 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat finish does the manifold have?\u003c\/strong\u003e The Sierra 18-1931-1 has a machined exterior finish.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat application is the 18-1931-1 manifold designed for?\u003c\/strong\u003e It falls under Sierra's Volvo Penta exhaust manifold lineup, designed to replace factory Volvo Penta manifolds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDo I need separate mounting hardware for the 18-1931-1?\u003c\/strong\u003e Yes, Sierra offers the 18-8511 and 18-8502 mounting kits, both specifically designed for use with the 18-1931-1 manifold.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the Sierra 18-8502 kit include hardware?\u003c\/strong\u003e Yes, the Sierra 18-8502 mounting kit, made for use with the 18-1931-1 manifold, includes mounting studs and hardware.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I cross-reference this part using a Volvo Penta OEM number?\u003c\/strong\u003e Yes, the 18-1931-1 replaces Volvo Penta 835804, 835804-6, 856883, and 856883-4.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the UPC available for the 18-1931-1 manifold?\u003c\/strong\u003e The UPC for the Sierra 18-1931-1 manifold is 808282237431.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes this manifold include installation hardware in the box?\u003c\/strong\u003e The manifold itself does not include mounting hardware; the matching 18-8511 or 18-8502 kits are sold separately and provide the studs and hardware.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill this manifold fit other brands besides Volvo Penta?\u003c\/strong\u003e The 18-1931-1 is categorized as a Volvo Penta exhaust manifold and cross-references to Volvo Penta, GLM, Mallory, and Osco part numbers.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988089254107,"sku":"SIE-18-1931-1","price":410.58,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/18-1931-1__34901.1729835971.500.750.jpg?v=1785188194","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-1931-1-exhaust-manifold-replaces-volvo-penta-835804-856883-omc-volvo-gm-small-block-v8-305-350-1979-89","provider":"Good Vibes Marina","version":"1.0","type":"link"}