FASWORX 27-863726 Full Flow Exhaust Riser Gasket for MerCruiser V6 V8 4.3L 5.0L 5.7L 6.2L 7.4L 8.2L 1982-2002 | Replaces 27-860232, 18-2849, 32080 | 4-Slot Open Standard Cooling Marine Engine Seal

FASWORX Premium Full Flow Exhaust Riser Gasket When maintaining high-stakes marine components, standard replacement parts often fall short. The FASWORX 4-slot full flow riser gasket is a true material upgrade, specifically engineered for the severe demands of the marine environment. Built from advanced, high-heat resistant core materials, it provides a perfect, long-lasting seal between the exhaust manifold and the riser, protecting your engine from saltwater corrosion and water intrusion.

• BUILT TO LAST IN HARSH CONDITIONS: Engineered as a premium material upgrade over standard paper alternatives. This high-heat resistant riser gasket is manufactured to withstand severe thermal cycling and highly corrosive saltwater environments for an uncompromising seal.
• EXACT FIT FOR MERCRUISER: Directly compatible with 1982–2002 MerCruiser V6 and V8 engines equipped with Center Rise Outlet Exhaust Manifolds (GM blocks, Small Block, and Big Block).
• CRITICAL FITMENT NOTE (READ BEFORE BUYING): This is a completely open, 4-slot gasket designed strictly for Standard Cooling systems. It is NOT compatible with newer Dry Joint exhaust systems manufactured from 2002 onward.
• OEM REPLACEMENT & CROSS REFERENCE: Seamlessly replaces OE part numbers 27-863726, 27-860232, 27-818832, 27-87105, and 27-871051. Aftermarket cross-references include Sierra 18-2849, GLM 32080, Mallory 9-61414, and Osco 8503-GO.
• HIGH-STAKES RELIABILITY: Designed to seal the critical junction between the exhaust manifold and the 3-inch or 4-inch riser, preventing catastrophic water intrusion into the engine block.