Cometic C5636-045 MLS Cylinder Head Gasket GM/Mercury Marine Gen-IV/V/VI Bore - 4.580

The Cometic C5636-045 is a multi-layer steel (MLS) cylinder head gasket engineered specifically for GM and Mercury Marine big block V8 Gen-IV, Gen-V, and Gen-VI engines. This precision-manufactured gasket features a .045" compressed thickness and is designed to accommodate a 4.580" bore diameter.

Key Features:

• Multi-layer steel (MLS) construction for superior sealing and durability
• .045" (1.14mm) compressed gasket thickness
• 4.580" bore diameter for proper cylinder sealing
• Compatible with 4-bolt lifter valley configuration
• Designed for GM and Mercury Marine big block V8 Gen-IV/V/VI applications
• Advanced material technology resists corrosion and extreme temperatures

Cometic's MLS head gaskets utilize multiple layers of stainless steel with proprietary coatings to create a gasket that can withstand extreme cylinder pressures and temperatures. The embossed layers provide multiple sealing points while allowing the gasket to conform to slight surface imperfections. This design is ideal for both stock and high-performance marine and automotive applications where reliability is critical.

This gasket is specifically configured for engines with four bolts in the lifter valley area, ensuring proper fitment for compatible GM and Mercury Marine engine blocks. The precision-cut design ensures accurate alignment and consistent clamping force across the entire sealing surface.