4.320 MLS Head Gasket .051 - BBC

The 4.320 MLS Head Gasket .051 by Cometic Gaskets is designed specifically for big-block Chevrolet (BBC) engines, ensuring precision sealing and durability under high combustion pressures. This gasket is ideal for performance builders, street racers, and restoration specialists who require reliability in high-horsepower situations.

Constructed from Multi-Layer Steel (MLS), this gasket features embossed stainless steel core layers and elastomer sealing beads that compress uniformly across the deck surface. The .051-inch thickness is optimized for maintaining compression ratios while providing effective sealing, making it suitable for both naturally aspirated and supercharged applications.

Builders transitioning from cast-iron to aluminum heads or assembling race engines exceeding 500 horsepower will find this gasket particularly beneficial. It helps prevent head lift and oil seepage, common issues with softer alternatives, especially under sustained high RPM and boost pressure conditions.