Cometic C5331-081 MLS Cylinder Head Gasket Chevy Big Block Mark IV Bore - 4.630

The Cometic C5331-081 is a Multi-Layer Steel (MLS) cylinder head gasket engineered specifically for Chevrolet Mark IV Big Block V8 engines with a 4.630-inch bore diameter. This precision gasket features a compressed thickness of .081 inches, making it ideal for performance applications requiring superior sealing and combustion chamber integrity.

Key Features:

• Multi-Layer Steel (MLS) construction provides maximum sealing and durability under extreme cylinder pressures
• 4.630-inch bore diameter accommodates standard and slightly overbored Mark IV Big Block applications
• .081-inch compressed thickness allows for precise compression ratio tuning
• Engineered for Chevrolet Mark IV Big Block V8 engines (396, 402, 427, 454, 502 cubic inch variants)
• Advanced gasket technology resists combustion gas leakage and coolant migration
• Suitable for high-performance street, strip, and racing applications

Cometic's MLS head gaskets feature multiple layers of stainless steel with strategically placed embossments that create a superior seal around combustion chambers, coolant passages, and oil return holes. The flexible design accommodates minor surface imperfections while maintaining exceptional sealing capability during thermal expansion and high-stress operating conditions.