{"title":"MerCruiser 330–370 · GM 454 \/ 502 CID · V8 B.B. Sterndrive — 1981 \u0026 Up · Wet Joint · 4 in · Exhaust system","description":"\u003cdiv class=\"model-catalog\"\u003e\n\u003cp\u003e\u003ca href=\"\/collections\/mercruiser-330370-gm-454-502-cid-v8-b-b-sterndrive-1981\"\u003eBack to MerCruiser 330–370 · GM 454 \/ 502 CID · V8 B.B. Sterndrive — 1981 \u0026amp; Up\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003eMatch the application and restrictions below with your engine or drive before ordering.\u003c\/p\u003e\n\u003cdiv style=\"overflow-x:auto\"\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eProduct\u003c\/th\u003e\n\u003cth\u003eApplication\u003c\/th\u003e\n\u003cth\u003eCatalog reference\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"\/products\/wet-joint-manifold-exhaust-hose-bellows-kit-for-mercruiser-454-502-wet-joint-27-863726\"\u003eWet-Joint Manifold Exhaust Hose Bellows Kit for MerCruiser 454\/502 Wet-Joint — 27-863726\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eYear: 1981 \u0026amp; Up; Joint: Wet Joint; Exhaust diameter (in): 4; Included gasket alternatives are selected for the installed cooling\/carburetor\/spacer configuration; not all gaskets are fitted simultaneously.\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"catalog-reference\"\u003eCatalog parts list\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n\u003c\/div\u003e","products":[{"product_id":"wet-joint-manifold-exhaust-hose-bellows-kit-for-mercruiser-454-502-wet-joint-27-863726","title":"Wet-Joint Manifold Exhaust Hose Bellows Kit for MerCruiser 454\/502 Wet-Joint — 27-863726","description":"\u003cdiv style=\"width:100%;max-width:920px;margin:0 auto;box-sizing:border-box;font-size:16px;line-height:1.75;color:#263c37;background:#ffffff;overflow-wrap:anywhere;\"\u003e\n  \u003csection style=\"margin:0;padding:26px 24px;border-top:3px solid #234f42;border-bottom:1px solid #d6dfd9;background:#f3f6f2;box-sizing:border-box;\"\u003e\n    \u003cp style=\"margin:0 0 12px;color:#315a4b;font-size:12px;font-weight:700;letter-spacing:1.4px;line-height:1.6;text-transform:uppercase;\"\u003eGH MARINE \/ BELLOWS \u0026amp; RELATED PARTS\u003c\/p\u003e\n    \u003ch2 style=\"margin:0 0 16px;color:#234f42;font-size:25px;font-weight:400;line-height:1.3;\"\u003eAbout this part\u003c\/h2\u003e\n    \u003cp style=\"margin:0 0 14px;\"\u003eWet-joint manifold exhaust hose bellows repair kit referenced to MerCruiser 27-863726 and 27-860233 for servicing the exhaust hose-bellows connection on Model 330–370 GM 454\/502 CID big-block V8 applications from 1981 and up.\u003c\/p\u003e\n    \u003cp style=\"margin:0 0 14px;\"\u003eDesigned for 4-inch wet-joint exhaust configurations; confirm the exhaust joint style, cooling setup, and required gasket version before ordering.\u003c\/p\u003e\n  \u003c\/section\u003e\n\n  \u003csection style=\"margin:0;padding:30px 0;border-bottom:1px solid #d6dfd9;\"\u003e\n    \u003ch2 style=\"margin:0 0 16px;color:#234f42;font-size:25px;font-weight:400;line-height:1.3;\"\u003eMatch the application\u003c\/h2\u003e\n    \u003cp style=\"margin:0 0 14px;\"\u003eThis kit applies to the MerCruiser big-block V8 wet-joint exhaust configuration listed below. Match the engine model, displacement, 4-inch designation, and wet-joint exhaust design before starting service.\u003c\/p\u003e\n    \u003cul style=\"list-style:none;margin:0;padding:0;\"\u003e\n      \u003cli style=\"margin:0;padding:16px 0;border-top:1px solid #d6dfd9;\"\u003e\n        \u003cp style=\"margin:0 0 4px;color:#234f42;font-size:17px;font-weight:700;line-height:1.5;\"\u003eMerCruiser · Model 330-370 (GM 454\/502 CID V8 Big Block)\u003c\/p\u003e\n        \u003cp style=\"margin:0;color:#263c37;font-size:15px;line-height:1.8;\"\u003e\u003cstrong\u003eYear:\u003c\/strong\u003e 1981 and up\u003c\/p\u003e\n        \u003cp style=\"margin:0;color:#263c37;font-size:15px;line-height:1.8;\"\u003eFor 4-inch wet-joint manifold exhaust hose bellows connections on GM 454 or 502 CID big-block V8 applications. Match the required gasket version and cooling configuration before ordering.\u003c\/p\u003e\n        \u003cp style=\"margin:6px 0 0;color:#315a4b;font-size:13px;font-weight:700;line-height:1.6;\"\u003eApplication match\u003c\/p\u003e\n      \u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/section\u003e\n\n  \u003csection style=\"margin:0;padding:30px 0;border-bottom:1px solid #d6dfd9;\"\u003e\n    \u003ch2 style=\"margin:0 0 16px;color:#234f42;font-size:25px;font-weight:400;line-height:1.3;\"\u003eNumbers to compare\u003c\/h2\u003e\n    \u003cp style=\"margin:0 0 16px;color:#52665e;font-size:15px;line-height:1.75;\"\u003eCompare the primary OEM and cross-reference numbers below against your existing manifold exhaust components and service parts list. Gasket and individual component references are listed for cross-checking your cooling and joint configuration and do not by themselves establish the exact package contents.\u003c\/p\u003e\n    \u003ctable style=\"width:100%;table-layout:fixed;border-collapse:collapse;text-align:left;font-size:15px;\"\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n          \u003cth scope=\"row\" style=\"width:36%;padding:12px 10px 12px 0;border-bottom:1px solid #d6dfd9;text-align:left;vertical-align:top;color:#52665e;font-weight:400;\"\u003ePrimary MerCruiser OEM references\u003c\/th\u003e\n          \u003ctd style=\"padding:12px 0 12px 10px;border-bottom:1px solid #d6dfd9;vertical-align:top;color:#263c37;overflow-wrap:anywhere;\"\u003e27-863726, 27-860233\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003cth scope=\"row\" style=\"width:36%;padding:12px 10px 12px 0;border-bottom:1px solid #d6dfd9;text-align:left;vertical-align:top;color:#52665e;font-weight:400;\"\u003eMerCruiser reference numbers\u003c\/th\u003e\n          \u003ctd style=\"padding:12px 0 12px 10px;border-bottom:1px solid #d6dfd9;vertical-align:top;color:#263c37;overflow-wrap:anywhere;\"\u003e27-41813, 27-863724, 27-87105-1, 27-818832, 27-87105, 27-871051, 27-860232, 27-860231\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003cth scope=\"row\" style=\"width:36%;padding:12px 10px 12px 0;border-bottom:1px solid #d6dfd9;text-align:left;vertical-align:top;color:#52665e;font-weight:400;\"\u003eSierra reference numbers\u003c\/th\u003e\n          \u003ctd style=\"padding:12px 0 12px 10px;border-bottom:1px solid #d6dfd9;vertical-align:top;color:#263c37;overflow-wrap:anywhere;\"\u003e18-0897, 18-2849-1, 18-2849-9-1, 18-1976-2, 18-1970-2\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003cth scope=\"row\" style=\"width:36%;padding:12px 10px 12px 0;border-bottom:1px solid #d6dfd9;text-align:left;vertical-align:top;color:#52665e;font-weight:400;\"\u003eGLM reference numbers\u003c\/th\u003e\n          \u003ctd style=\"padding:12px 0 12px 10px;border-bottom:1px solid #d6dfd9;vertical-align:top;color:#263c37;overflow-wrap:anywhere;\"\u003e32080, 30240\u003c\/td\u003e\n        \u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/section\u003e\n\n  \u003csection style=\"margin:0;padding:30px 0;border-bottom:1px solid #d6dfd9;\"\u003e\n    \u003ch2 style=\"margin:0 0 16px;color:#234f42;font-size:25px;font-weight:400;line-height:1.3;\"\u003eTechnical details\u003c\/h2\u003e\n    \u003ctable style=\"width:100%;table-layout:fixed;border-collapse:collapse;text-align:left;font-size:15px;\"\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n          \u003cth scope=\"row\" style=\"width:36%;padding:12px 10px 12px 0;border-bottom:1px solid #d6dfd9;text-align:left;vertical-align:top;color:#52665e;font-weight:400;\"\u003eProduct type\u003c\/th\u003e\n          \u003ctd style=\"padding:12px 0 12px 10px;border-bottom:1px solid #d6dfd9;vertical-align:top;color:#263c37;\"\u003eWet-joint manifold exhaust hose bellows repair kit\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003cth scope=\"row\" style=\"width:36%;padding:12px 10px 12px 0;border-bottom:1px solid #d6dfd9;text-align:left;vertical-align:top;color:#52665e;font-weight:400;\"\u003eBrand\u003c\/th\u003e\n          \u003ctd style=\"padding:12px 0 12px 10px;border-bottom:1px solid #d6dfd9;vertical-align:top;color:#263c37;\"\u003eGH Marine\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003cth scope=\"row\" style=\"width:36%;padding:12px 10px 12px 0;border-bottom:1px solid #d6dfd9;text-align:left;vertical-align:top;color:#52665e;font-weight:400;\"\u003eExhaust joint configuration\u003c\/th\u003e\n          \u003ctd style=\"padding:12px 0 12px 10px;border-bottom:1px solid #d6dfd9;vertical-align:top;color:#263c37;\"\u003eWet-joint\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003cth scope=\"row\" style=\"width:36%;padding:12px 10px 12px 0;border-bottom:1px solid #d6dfd9;text-align:left;vertical-align:top;color:#52665e;font-weight:400;\"\u003eSize designation\u003c\/th\u003e\n          \u003ctd style=\"padding:12px 0 12px 10px;border-bottom:1px solid #d6dfd9;vertical-align:top;color:#263c37;\"\u003e4 in.\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003cth scope=\"row\" style=\"width:36%;padding:12px 10px 12px 0;border-bottom:1px solid #d6dfd9;text-align:left;vertical-align:top;color:#52665e;font-weight:400;\"\u003eEngine configuration\u003c\/th\u003e\n          \u003ctd style=\"padding:12px 0 12px 10px;border-bottom:1px solid #d6dfd9;vertical-align:top;color:#263c37;\"\u003eGM 454 \/ 502 CID big-block V8 (Model 330–370)\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003cth scope=\"row\" style=\"width:36%;padding:12px 10px 12px 0;border-bottom:1px solid #d6dfd9;text-align:left;vertical-align:top;color:#52665e;font-weight:400;\"\u003eService location\u003c\/th\u003e\n          \u003ctd style=\"padding:12px 0 12px 10px;border-bottom:1px solid #d6dfd9;vertical-align:top;color:#263c37;\"\u003eManifold exhaust hose-bellows connection\u003c\/td\u003e\n        \u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/section\u003e\n\n  \u003csection style=\"margin:0;padding:30px 0;border-bottom:1px solid #d6dfd9;\"\u003e\n    \u003ch2 style=\"margin:0 0 16px;color:#234f42;font-size:25px;font-weight:400;line-height:1.3;\"\u003eSupplied contents\u003c\/h2\u003e\n    \u003cul style=\"margin:0;padding-left:22px;\"\u003e\n      \u003cli style=\"margin:0 0 10px;\"\u003eWet-joint manifold exhaust hose bellows repair kit\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/section\u003e\n\n  \u003csection style=\"margin:0;padding:30px 0;border-bottom:1px solid #d6dfd9;\"\u003e\n    \u003ch2 style=\"margin:0 0 16px;color:#234f42;font-size:25px;font-weight:400;line-height:1.3;\"\u003eWorkshop sequence\u003c\/h2\u003e\n    \u003cp style=\"margin:0 0 16px;color:#52665e;font-size:15px;line-height:1.75;\"\u003eGeneral workshop guidance only; use the service procedure for your exact drive or engine configuration.\u003c\/p\u003e\n    \u003col style=\"margin:0;padding-left:22px;list-style-type:decimal;\"\u003e\n      \u003cli style=\"margin:0 0 10px;\"\u003eAllow the engine and exhaust system to cool completely, isolate the battery, and prevent water entry through the exhaust system before disconnecting exhaust components.\u003c\/li\u003e\n      \u003cli style=\"margin:0 0 10px;\"\u003eVerify that the engine uses the 4-inch wet-joint manifold and riser arrangement and check the cooling water passage layout before disassembly.\u003c\/li\u003e\n      \u003cli style=\"margin:0 0 10px;\"\u003eRemove the worn exhaust hose bellows and clean the mating necks and sealing surfaces on the manifold and exhaust elbow or riser, checking for corrosion, pitting, or distortion.\u003c\/li\u003e\n      \u003cli style=\"margin:0 0 10px;\"\u003eFit the replacement components in the orientation specified by your MerCruiser service manual, ensuring the hose bellows sits evenly on the connections without twisting or kinking.\u003c\/li\u003e\n    \u003c\/ol\u003e\n  \u003c\/section\u003e\n\n  \u003csection style=\"margin:0;padding:30px 0;border-bottom:1px solid #d6dfd9;\"\u003e\n    \u003ch2 style=\"margin:0 0 16px;color:#234f42;font-size:25px;font-weight:400;line-height:1.3;\"\u003eAbout GH Marine\u003c\/h2\u003e\n    \u003cp style=\"margin:0 0 14px;\"\u003eGH Marine focuses on bellows and related marine service parts. Compare the application details, reference numbers and supplied contents together to select the part for your repair.\u003c\/p\u003e\n  \u003c\/section\u003e\n\n  \u003csection style=\"margin:0;padding:30px 0;border-bottom:1px solid #d6dfd9;\"\u003e\n    \u003ch2 style=\"margin:0 0 16px;color:#234f42;font-size:25px;font-weight:400;line-height:1.3;\"\u003eDelivery information\u003c\/h2\u003e\n    \u003cp style=\"margin:0 0 14px;\"\u003eEstimated delivery: 7–15 calendar days.\u003c\/p\u003e\n  \u003c\/section\u003e\n\u003csection style=\"margin:0;padding:30px 0;border-bottom:1px solid #d6dfd9;\"\u003e\u003ch2 style=\"margin:0 0 16px;color:#234f42;font-size:25px;font-weight:400;line-height:1.3;\"\u003eHelp with your order\u003c\/h2\u003e\n\u003cp style=\"margin:0 0 14px;\"\u003eFor application questions, have your drive or engine identification and required part number ready.\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/gh-marine.com\/pages\/contact\"\u003eContact GH Marine \/ fitment help\u003c\/a\u003e · \u003ca href=\"https:\/\/gh-marine.com\/pages\/returns-policy\"\u003eReturns policy\u003c\/a\u003e\u003c\/p\u003e\u003c\/section\u003e\n\u003c\/div\u003e","brand":"GH Marine","offers":[{"title":"Default Title","offer_id":52022983786742,"sku":"24MFK126","price":107.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0741\/5781\/8102\/files\/ebe20babda5f3e305982d608b21149f70e02d8867a48015b0797f4264553a959.jpg?v=1792808887"}],"url":"https:\/\/gh-marine.com\/collections\/mercruiser-330370-gm-454-502-cid-v8-b-b-sterndrive-1981-wet-joint-4-in-exhaust-system.oembed","provider":"GH Marine","version":"1.0","type":"link"}