Cometic C5331-023 MLS Cylinder Head Gasket Chevy Big Block Mark IV Bore - 4.630

The Cometic C5331-023 is a precision-engineered Multi-Layer Steel (MLS) cylinder head gasket designed specifically for Chevrolet Mark IV Big Block V8 engines. This gasket features a 4.630-inch bore diameter and a compressed thickness of .023 inches, making it ideal for performance and racing applications where precise combustion sealing is critical.

Key Features:

• Multi-Layer Steel (MLS) construction provides superior sealing and durability under extreme temperatures and pressures
• 4.630-inch bore diameter accommodates standard and slightly over-bored Big Block cylinders
• .023-inch compressed thickness allows for precise compression ratio tuning
• Engineered specifically for Chevrolet Mark IV Big Block V8 applications (396, 402, 427, 454 cubic inch engines)
• Embossed stainless steel layers with advanced coating technology ensure consistent clamping pressure
• Reusable design ideal for engine builders and racers who frequently disassemble engines

Cometic MLS gaskets are the preferred choice of professional engine builders and racing teams worldwide. The multiple layers of stainless steel provide excellent recovery characteristics and conform to imperfect sealing surfaces, while resisting combustion gas leakage, coolant leakage, and oil leakage even in high-boost forced induction applications.