Cometic C5403-075 MLS Cylinder Head Gasket Chevy Small Block Bore - for V8 4.200

The Cometic C5403-075 is a premium Multi-Layer Steel (MLS) cylinder head gasket engineered specifically for Chevrolet Generation 1 Small Block V8 engines. This high-performance gasket features a .075" (0.075 inch) compressed thickness and is designed for a 4.200" bore diameter, making it ideal for custom engine builds and performance applications.

Key Features:

• Multi-Layer Steel (MLS) construction provides superior sealing and durability under high-compression and high-boost conditions
• 4.200" bore diameter accommodates a wide range of small block Chevy configurations
• .075" compressed thickness allows for precise compression ratio tuning
• Undersized water ports enable custom port matching and coolant flow optimization for aftermarket cylinder heads
• Compatible with aftermarket performance heads that require custom water port fitment
• Engineered to withstand extreme cylinder pressures and temperatures

Cometic's MLS gaskets feature multiple layers of stainless steel with a Viton rubber coating that ensures exceptional conformability to sealing surfaces. The undersized water ports give engine builders the flexibility to machine the gasket to match their specific cylinder head water passages, ensuring proper coolant flow and eliminating potential leak paths. This gasket is the professional choice for serious small block Chevy builds where precision and reliability are paramount.