{"product_id":"sierra-18-2746-exhaust-boot-4-lower-tube-replaces-mercruiser-32-14358-fits-gm-v-6-v-8-stern-drives","title":"Sierra 18-2746 Lower Exhaust Boot, 4 Inch Tube, Fits Mercruiser MCM GM V-6 \u0026 V-8 Engines, Replaces Mercury Marine 32-14358T","description":"\u003cp\u003eThe Sierra 18-2746 is a lower exhaust boot built for Mercruiser MCM stern drive installations powered by GM V-6 and V-8 engines. It connects the exhaust manifold or riser to the exhaust tube, sealing the joint against exhaust gas and water intrusion while absorbing the vibration and slight misalignment that occurs between rigid engine components and the drive system. The lower tube measures 4 inches (101.6mm), matching the factory exhaust tube diameter on applicable Mercruiser installations.\u003c\/p\u003e\u003cp\u003eSierra manufactures this exhaust boot to meet or exceed the performance of the original equipment part it replaces, and it is built to hold up to the heat, saltwater, and constant vibration of marine exhaust service. Sierra supplies parts to OEM engine manufacturers and boat builders, so the 18-2746 is engineered to the same fit and function standard as the factory boot it is designed to replace.\u003c\/p\u003e\u003cp\u003eThis exhaust boot is a direct fit for Mercruiser MCM GM V-6 and V-8 powered stern drive engines. Always confirm the 4 inch lower tube diameter matches your existing exhaust boot before ordering.\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 18-2746\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Lower Exhaust Boot\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits:\u003c\/strong\u003e Mercruiser MCM GM V-6 \u0026amp; V-8 engines\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLower Tube Diameter:\u003c\/strong\u003e 4 inches (101.6mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.77 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 030999752949\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e Mercury Marine 32-14358T\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eMercruiser MCM GM V-6 \u0026amp; V-8 engines\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eMercury Marine 32-14358T\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-2746 exhaust boot fit?\u003c\/strong\u003e The Sierra 18-2746 is designed for Mercruiser MCM stern drive installations powered by GM V-6 and V-8 engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat size is the lower tube on this exhaust boot?\u003c\/strong\u003e The lower tube on the Sierra 18-2746 measures 4 inches, or 101.6mm, in diameter.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-2746 a direct replacement for the Mercury Marine 32-14358T?\u003c\/strong\u003e Yes, the Sierra 18-2746 is built to replace Mercury Marine part number 32-14358T and is engineered to meet or exceed the fit and function of the original part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-2746 exhaust boot weigh?\u003c\/strong\u003e It weighs 0.77 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-2746 an OEM part or an aftermarket replacement?\u003c\/strong\u003e The Sierra 18-2746 is an aftermarket exhaust boot manufactured by Sierra to meet or exceed the performance of the original equipment Mercury Marine part it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhere does the 18-2746 exhaust boot install on a Mercruiser stern drive?\u003c\/strong\u003e It fits in the lower exhaust tube section, connecting the exhaust path on Mercruiser MCM GM V-6 and V-8 engine installations.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-2746?\u003c\/strong\u003e The UPC for the Sierra 18-2746 exhaust boot is 030999752949.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the Sierra 18-2746 work with both V-6 and V-8 Mercruiser engines?\u003c\/strong\u003e Yes, the Sierra 18-2746 is listed to fit Mercruiser MCM GM V-6 and V-8 engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the product dimensions of the 18-2746 exhaust boot?\u003c\/strong\u003e The Sierra 18-2746 measures 0.39 x 0.39 x 0.39 inches as packaged.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy does the exhaust boot need to be replaced?\u003c\/strong\u003e Exhaust boots like the Sierra 18-2746 are exposed to constant heat, saltwater, and vibration, which over time can cause the original boot to crack, harden, or leak and require replacement.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes Sierra make quality parts comparable to OEM Mercury Marine components?\u003c\/strong\u003e Sierra supplies parts to OEM engine manufacturers and boat builders, and the 18-2746 exhaust boot is built to meet or exceed the original equipment part it replaces.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988109832411,"sku":"SIE-18-2746","price":41.38,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/Untitled-1__59246.1753731594.500.750.jpg?v=1785188315","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-2746-exhaust-boot-4-lower-tube-replaces-mercruiser-32-14358-fits-gm-v-6-v-8-stern-drives","provider":"Good Vibes Marina","version":"1.0","type":"link"}