Cometic C5401-075 MLS Cylinder Head Gasket Small Block Chevy 4.135 Bore .075 Thickness

The Cometic C5401-075 is a Multi-Layer Steel (MLS) cylinder head gasket engineered specifically for Chevrolet Generation 1 Small Block V8 engines. This high-performance gasket features a 4.135-inch bore diameter and .075-inch (0.075") compressed thickness, making it ideal for performance and racing applications requiring precise compression ratio tuning.

Key Features:

• Multi-Layer Steel (MLS) construction provides superior sealing and durability under extreme cylinder pressures and temperatures
• 4.135-inch bore diameter accommodates both stock and slightly overbored small block Chevy engines
• .075-inch compressed thickness allows for compression ratio adjustment and deck height optimization
• Undersized water ports designed for aftermarket cylinder heads, allowing custom port matching and coolant flow optimization
• Embossed stainless steel layers with advanced coating technology ensure maximum sealing at combustion chamber, coolant, and oil passages
• Suitable for both naturally aspirated and forced induction applications

Cometic MLS gaskets are the choice of professional engine builders and racers worldwide. The layered steel design allows the gasket to recover and maintain torque loading better than traditional composite gaskets, while the embossed sealing beads concentrate load around critical sealing areas. The undersized water ports on this gasket provide the flexibility needed when working with aftermarket heads that may have different port configurations than OEM castings.