Cometic C5080-040 MLS Cylinder Head Gasket Chevy Big Block Mark IV Bore - for 4.500

The Cometic C5080-040 is a high-performance Multi-Layer Steel (MLS) cylinder head gasket engineered specifically for Chevrolet Mark IV Big Block V8 engines with a 4.500-inch bore diameter. This precision gasket features a compressed thickness of .040 inches, making it ideal for performance builds and custom compression ratio tuning.

Key Features:

• Multi-Layer Steel (MLS) construction provides superior sealing and durability under extreme cylinder pressures
• .040-inch compressed thickness allows for compression ratio adjustment and deck height correction
• 4.500-inch bore diameter accommodates standard and performance Big Block configurations
• Embossed stainless steel layers with elastomeric coating ensure optimal sealing on imperfect surfaces
• Designed to withstand high-temperature and high-pressure racing conditions
• Compatible with Chevrolet Mark IV Big Block V8 engines including 396, 402, 427, and 454 cubic inch variants

Cometic MLS gaskets are the preferred choice for engine builders and performance enthusiasts who demand reliable sealing in demanding applications. The multi-layer design allows the gasket to conform to minor surface irregularities while maintaining excellent combustion sealing and resistance to blow-out. This gasket is sold individually and should be used with proper surface preparation and assembly procedures for optimal performance.