4.540 MLS Head Gasket .040 - BBC

The Cometic Gaskets 4.540 MLS Head Gasket .040 for Big Block Chevy is designed for high-performance and competitive engine builds where reliability is essential. This gasket is ideal for builders who are modifying their BBC engines for turbo builds, nitrous applications, or other serious enhancements.

Constructed from multi-layer steel (MLS), this gasket provides superior sealing performance compared to traditional composite gaskets. The .040-inch thickness is engineered to match cylinder head and block deck surfaces precisely, ensuring optimal compression ratios and head clamping load distribution. The individual steel layers with elastomer coatings create a conformable seal that withstands high-RPM and high-boost environments.

This gasket is perfect for builders running modified BBC engines in street performance cars and drag racing platforms. Cometic's manufacturing tolerances ensure that the gasket seals effectively on the first try, reducing the risk of failure associated with inferior materials.