Cometic C5329-086 MLS Cylinder Head Gasket Chevy Big Block Mark IV Bore - for 4.375

The Cometic C5329-086 is a premium Multi-Layer Steel (MLS) cylinder head gasket engineered specifically for Chevrolet Mark IV Big Block V8 engines with a 4.375-inch bore diameter. This gasket features a compressed thickness of .086 inches, making it ideal for high-performance and racing applications where precise deck height and compression ratio control are critical.

Key Features:

• Multi-Layer Steel (MLS) construction provides superior sealing and durability under extreme cylinder pressures
• 4.375-inch bore diameter fits standard and slightly over-bored big block Chevy applications
• .086-inch compressed thickness allows for precise compression ratio tuning
• Advanced embossment technology ensures consistent clamping force distribution
• Viton rubber coating on outer layers provides exceptional resistance to coolant and oil
• Stainless steel core layers prevent corrosion and maintain gasket integrity through repeated heat cycles
• Compatible with aluminum and cast iron cylinder heads

Cometic MLS head gaskets are the choice of professional engine builders and racers worldwide. The multi-layer design allows the gasket to adapt to minor surface imperfections while maintaining a reliable seal, even in boosted or nitrous applications. This gasket is designed for engines with properly prepared surfaces (RA finish of 50-60 recommended) and requires appropriate head stud or bolt torque specifications for optimal performance.