Cometic C5638-036 GM/Mercury Marine Gen-IV Big Block MLS Cylinder Head Gasket - V8

The Cometic C5638-036 is a premium Multi-Layer Steel (MLS) cylinder head gasket engineered specifically for GM and Mercury Marine Gen-IV 1050 Big Block V8 engines. This high-performance gasket features a .036-inch (0.91mm) compressed thickness and is precision-manufactured to accommodate a 4.500-inch bore diameter.

Key Features:

• Multi-Layer Steel (MLS) construction provides superior sealing and durability under extreme conditions
• .036-inch compressed gasket thickness for precise compression ratio tuning
• 4.500-inch bore diameter designed for big block applications
• Includes two slotted lifter valley bolt provisions for proper engine assembly
• Engineered for both GM automotive and Mercury Marine performance applications
• Advanced MLS technology delivers exceptional combustion sealing and reusability

Cometic MLS head gaskets are constructed from multiple layers of stainless steel, which allows the gasket to conform to imperfections in the block and head surfaces while maintaining optimal sealing pressure. This design makes them ideal for high-performance, forced induction, and marine applications where reliability is critical. The gasket's material properties provide excellent resistance to corrosion in marine environments and can withstand the thermal cycling of high-output engines.