Cometic C5641-052 GM Mercury Marine Gen IV Big Block V8 MLS Cylinder Head Gasket

The Cometic C5641-052 is a precision-engineered Multi-Layer Steel (MLS) cylinder head gasket designed specifically for GM and Mercury Marine Gen-IV big block V8 engines with a 4.600-inch bore. This high-performance gasket features advanced MLS construction with a .052-inch compressed thickness, providing superior sealing capability under extreme cylinder pressures and temperatures.

Key Features:

• Multi-Layer Steel (MLS) construction for maximum durability and reusability
• 4.600-inch bore diameter for proper combustion chamber sealing
• .052-inch (1.32mm) compressed thickness for precise deck height control
• Includes two slotted lifter valley bolt holes for Gen-IV architecture compatibility
• Designed for GM and Mercury Marine 1050 Gen-IV big block V8 applications
• Superior resistance to blowout and thermal cycling compared to traditional composite gaskets

Cometic MLS gaskets utilize multiple layers of stainless steel with advanced coating technology to create a micro-seal that conforms to cylinder head and block surface imperfections. This design allows the gasket to recover and maintain sealing integrity through repeated heat cycles, making it ideal for high-performance marine and automotive applications where reliability is critical.