Cometic C5634-092 GM Mercury Marine Big Block V8 MLS Cylinder Head Gasket 4.500" Bore

The Cometic C5634-092 is a premium Multi-Layer Steel (MLS) cylinder head gasket engineered for GM and Mercury Marine Big Block V8 Gen-IV, Gen-V, and Gen-VI marine engines. This high-performance gasket features a compressed thickness of .092 inches and accommodates a 4.500-inch cylinder bore diameter.

Key Features:

• Multi-Layer Steel (MLS) construction provides superior sealing and durability under extreme temperatures and pressures
• .092-inch compressed gasket thickness for precise compression control
• 4.500-inch bore diameter designed for big block V8 applications
• Compatible with 4-bolt lifter valley configuration
• Engineered specifically for GM and Mercury Marine Gen-IV, Gen-V, and Gen-VI engines
• Embossed stainless steel layers with a Viton rubber coating ensure optimal sealing

Cometic MLS gaskets are the preferred choice for high-performance marine applications where reliability is critical. The multi-layer design allows the gasket to adapt to minor surface imperfections while maintaining consistent clamping pressure across the entire sealing surface. This gasket is ideal for both stock rebuilds and performance upgrades on compatible GM and Mercury Marine big block engines.