Cometic C5816-075 MLS Cylinder Head Gasket Chevy Big Block Mark IV Bore - for V8 4.320

The Cometic C5816-075 is a high-performance Multi-Layer Steel (MLS) cylinder head gasket engineered specifically for Chevrolet Mark IV Big Block V8 engines. This gasket features a 4.320-inch bore diameter and 0.075-inch compressed thickness, making it ideal for performance and racing applications where precision sealing and durability are critical.

Key Features:

• Multi-Layer Steel (MLS) construction provides superior sealing and durability under extreme conditions
• 4.320-inch bore diameter accommodates standard and slightly overbored Mark IV Big Block applications
• 0.075-inch (1.91mm) compressed thickness allows for precise compression ratio tuning
• Stainless steel construction with FKM (fluoroelastomer) coating resists temperature extremes and chemical degradation
• Embossed layers create multiple sealing points for improved combustion seal
• Ideal for high-performance, forced induction, and racing applications

Cometic MLS head gaskets are designed to withstand the extreme cylinder pressures and temperatures found in modified and high-output engines. The multiple layers of stainless steel with elastomer coatings provide optimal sealing while accommodating minor surface imperfections and thermal expansion. This gasket is manufactured to exacting tolerances and is a direct replacement for Chevrolet Big Block Mark IV engines including 396, 402, 427, and 454 cubic inch variants.