Cometic C5434-075 MLS Cylinder Head Gasket Chevy Big Block Bore - for V8 4.630

The Cometic C5434-075 is a premium Multi-Layer Steel (MLS) cylinder head gasket engineered for Chevrolet Mark IV and GM Gen V/VI Big Block V8 engines. This high-performance gasket features a .075" compressed thickness and is designed with a 4.630" bore diameter to accommodate various engine builds.

Key Features:

• Multi-Layer Steel (MLS) construction for superior sealing and durability
• .075" (1.9mm) compressed thickness for precise deck height control
• 4.630" bore diameter optimized for performance applications
• Undersized water ports allow for custom port matching and optimization
• Designed specifically for aftermarket cylinder heads
• Compatible with Chevrolet Mark IV, GM Gen V, and Gen VI Big Block V8 engines

Cometic's MLS gaskets utilize multiple layers of stainless steel with advanced coating technology to provide exceptional combustion sealing, even under extreme cylinder pressures. The undersized water ports give engine builders the flexibility to customize coolant flow by enlarging ports to match specific cylinder head designs, ensuring optimal cooling performance in high-output applications.