{"product_id":"sierra-18-4396-exhaust-manifold-gasket-set-for-mercruiser-250-4-1l-cid-165-hp-replaces-27-46401a1","title":"Sierra 18-4396 Exhaust Manifold Gasket Set, Replaces 27-46401A1, for 250 (4.1L) CID Engine 165 HP S\/N 2770032 \u0026 Up","description":"\u003cp\u003eThe Sierra 18-4396 Exhaust Manifold Gasket Set is built to meet or exceed original equipment quality for engines that call for OEM 27-46401A1. This set is engineered for 250 (4.1L) CID engines rated at 165 HP with serial numbers 2770032 and up, giving boat owners a direct replacement when resealing the exhaust manifold during maintenance or after a failed gasket causes leaks, overheating, or exhaust smell in the engine compartment.\u003c\/p\u003e\u003cp\u003eThe kit includes the components needed to reseal the exhaust manifold joint, including an intake exhaust gasket (O.E. 27-46401) and a thermostat gasket, so the job can be completed without sourcing separate individual gaskets. Each gasket is manufactured to original equipment specifications for a proper seal and reliable fit against the mating surfaces.\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 18-4396\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Exhaust Manifold Gasket Set\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded Components:\u003c\/strong\u003e Exhaust Manifold Gasket Set (Intake Exhaust Gasket, Thermostat Gasket)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Items:\u003c\/strong\u003e 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.48 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999563590\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e250 (4.1L) CID Engine, 165 HP, S\/N 2770032 \u0026amp; Up\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e27-46401A1\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-4396 Exhaust Manifold Gasket Set fit?\u003c\/strong\u003e It is designed for 250 (4.1L) CID engines rated at 165 HP with serial numbers 2770032 and up.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part number does Sierra 18-4396 replace?\u003c\/strong\u003e It replaces OEM part number 27-46401A1.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included in the 18-4396 gasket set?\u003c\/strong\u003e The set contains an intake exhaust gasket (O.E. 27-46401) and a thermostat gasket, giving you the gaskets needed to reseal the exhaust manifold joint in one package.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many of these gasket sets come in a package?\u003c\/strong\u003e The Sierra 18-4396 ships as a single set containing one of each included gasket.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-4396 gasket set weigh?\u003c\/strong\u003e It weighs 0.48 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs Sierra 18-4396 an OEM part or an aftermarket replacement?\u003c\/strong\u003e It is an aftermarket Sierra part manufactured to meet or exceed the quality of the original equipment part it replaces, OEM 27-46401A1.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen should I replace the exhaust manifold gasket set?\u003c\/strong\u003e Replace the gasket set anytime the exhaust manifold is removed for service, or if you notice exhaust leaks, unusual exhaust smell in the engine bay, or coolant\/water seepage near the manifold joint, since a worn gasket will not reseal reliably once disturbed.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes Sierra 18-4396 include the thermostat gasket?\u003c\/strong\u003e Yes, a thermostat gasket is included along with the intake exhaust gasket in this set.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for Sierra part 18-4396?\u003c\/strong\u003e The UPC for the Sierra 18-4396 Exhaust Manifold Gasket Set is 030999563590.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill this gasket set work on any marine engine?\u003c\/strong\u003e No, the 18-4396 set is specific to 250 (4.1L) CID engines, 165 HP, with serial numbers 2770032 and up; confirm your engine's serial number falls in that range before ordering.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988196929755,"sku":"SIE-18-4396","price":54.05,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-4396_lg__23291.1660569172.500.750.jpg?v=1785188393","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-4396-exhaust-manifold-gasket-set-for-mercruiser-250-4-1l-cid-165-hp-replaces-27-46401a1","provider":"Good Vibes Marina","version":"1.0","type":"link"}