4.200 MLS Head Gasket .040 - SBC

The Cometic Gaskets 4.200 MLS Head Gasket .040 is a precision sealing solution designed specifically for Small Block Chevy (SBC) engines. It is ideal for serious engine builders and performance mechanics who require reliable, leak-free seals under extreme combustion pressures and thermal cycling. This gasket is essential for maintaining engine longevity and performance consistency, whether you're rebuilding a stock 305 or assembling a modern stroker engine.

Constructed with Multi-Layer Steel (MLS), this gasket offers superior sealing capabilities compared to traditional composite gaskets. Its .040-inch thickness is engineered for 4.200-inch bore diameters, ensuring proper clamping load distribution across the deck surface. The MLS design minimizes gasket creep and blow-by, maintaining consistent cylinder pressure for both naturally aspirated and forced induction setups.

Performance enthusiasts, engine machine shops, and professional rebuilders choose Cometic MLS gaskets for any Small Block Chevy project where sealing integrity is critical. This gasket is suitable for both street and competition engines, providing reliability across varied operating conditions. Its resistance to coolant and oil degradation makes it a trusted choice for high-horsepower applications.