Cometic C5331-140 MLS Cylinder Head Gasket Chevy Big Block Mark IV Bore - for 4.630

The Cometic C5331-140 is a premium 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 gasket features a compressed thickness of .140 inches, providing excellent sealing capability for high-performance and racing applications.

Key Features:

• Multi-Layer Steel (MLS) construction for superior strength and durability
• 4.630-inch bore diameter designed for Big Block Chevy Mark IV engines
• .140-inch (3.56mm) compressed thickness for optimal sealing
• Advanced MLS technology provides excellent recovery and conformability
• Resists blowout and maintains consistent clamping force under extreme conditions
• Ideal for high-compression, turbocharged, supercharged, and nitrous applications

Cometic MLS gaskets feature multiple layers of stainless steel with proprietary coatings that allow the gasket to adapt to sealing surface imperfections while maintaining torque retention. This design accommodates engine movement and thermal expansion better than traditional composite gaskets, making it the preferred choice for serious performance builds and professional racing applications.