{"product_id":"sierra-18-4389-intake-manifold-gasket-set-for-gm-262-cid-4-3l-175-185-205-hp-replaces-27-11977a88","title":"Sierra 18-4389 Intake Manifold Gasket Set, Replaces 27-11977A88, for GM 262 CID 4.3L 175-205 HP Marine Engines","description":"\u003cp\u003eThe Sierra 18-4389 Intake Manifold Gasket Set seals the intake manifold on GM 262 CID (4.3L) marine engines rated 175, 185, and 205 HP. It is designed as a direct replacement for the factory gaskets on this engine family, restoring a proper seal between the intake manifold and cylinder heads to prevent vacuum leaks, coolant intrusion, and oil seepage that can develop as the original gaskets age and harden.\u003c\/p\u003e\u003cp\u003eThis set includes the 18-3879 head gasket, so installers have the additional gasket needed for a complete intake-area reseal without having to source it separately. It cross-references directly to Mercury Marine part numbers 27-11977A88 and A92, making it easy to confirm this is the correct replacement when servicing GM 262 CID \/ 4.3L marine engines within the specified horsepower range.\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 18-4389\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Mercruiser Engine Gasket Sets\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 1.32 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999563521\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncludes:\u003c\/strong\u003e 18-3879 Head Gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine Fitment:\u003c\/strong\u003e GM 262 CID Eng; 175, 185 \u0026amp; 205 HP, 4.3L\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e 27-11977A88, A92\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eGM 262 CID Engine, 4.3L\u003c\/li\u003e\n\u003cli\u003e175, 185 \u0026amp; 205 HP\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e27-11977A88\u003c\/li\u003e\n\u003cli\u003eA92\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engine does the Sierra 18-4389 fit?\u003c\/strong\u003e The Sierra 18-4389 Intake Manifold Gasket Set fits GM 262 CID (4.3L) marine engines rated 175, 185, and 205 HP.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part numbers does 18-4389 replace?\u003c\/strong\u003e It replaces Mercury Marine part numbers 27-11977A88 and A92, so it is a direct match for engines originally fitted with either of those gaskets.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes this set include a head gasket?\u003c\/strong\u003e Yes, the 18-4389 set includes the 18-3879 head gasket in addition to the intake manifold gasket components.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-4389 gasket set weigh?\u003c\/strong\u003e This Sierra intake manifold gasket set weighs 1.32 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-4389 an OEM or aftermarket part?\u003c\/strong\u003e It is a Sierra aftermarket gasket set manufactured to match the fit of Mercury OEM numbers 27-11977A88 and A92 for GM 262 CID 4.3L marine engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill 18-4389 work on a 4.3L GM marine engine rated 220 HP?\u003c\/strong\u003e The Sierra 18-4389 is specified for GM 262 CID 4.3L engines rated 175, 185, and 205 HP; horsepower ratings outside that range are not covered by this listing.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included in the box with part 18-4389?\u003c\/strong\u003e The box contains the intake manifold gasket set along with the 18-3879 head gasket for this GM 262 CID 4.3L application.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I use the UPC to verify I am ordering the correct gasket set?\u003c\/strong\u003e Yes, Sierra 18-4389 carries UPC 030999563521, which can be used to confirm the exact product when ordering.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is the 18-4389 gasket set made from?\u003c\/strong\u003e The dossier for this listing does not specify the gasket material for the Sierra 18-4389 set.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-4389 gasket set fit inline 6-cylinder GM engines?\u003c\/strong\u003e No, the 18-4389 is specified for the GM 262 CID (4.3L) V-type engine family rated 175, 185, and 205 HP, not inline 6-cylinder applications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow do I know this gasket set matches my Mercury-powered boat?\u003c\/strong\u003e If your engine's original gasket carries Mercury number 27-11977A88 or A92, the Sierra 18-4389 is the matching replacement set.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988196503771,"sku":"SIE-18-4389","price":123.74,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-4389_lg__41219.1558127363.500.750.jpg?v=1785188133","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-4389-intake-manifold-gasket-set-for-gm-262-cid-4-3l-175-185-205-hp-replaces-27-11977a88","provider":"Good Vibes Marina","version":"1.0","type":"link"}