4.185 MLS Head Gasket .045 GM LSX LH

The Cometic Gaskets 4.185 MLS Head Gasket .045 GM LSX LH is designed specifically for high-performance GM LSX engine builds, ensuring precision sealing and durability under extreme cylinder pressures. This gasket is ideal for builders assembling street machines, bracket racers, or forced-induction platforms, providing the reliable seal necessary for power outputs that exceed factory specifications.

Constructed from multi-layer steel (MLS), this gasket offers superior sealing properties along with exceptional thermal stability and reusability. The .045-inch thickness is engineered to fit the tight tolerances of LSX cylinder head surfaces, ensuring consistent compression without the need for special machining or resurfacing. MLS gaskets utilize multiple laser-welded steel layers that expand and contract with the cylinder head and block, maintaining positive load pressure across the combustion chamber.

This gasket is compatible with 4.185-inch bore diameter LSX heads, making it suitable for most LS2, LS3, LS7, and LS9 performance cylinder heads. Builders looking for a reliable and high-performance sealing solution will find this gasket meets the demands of aggressive throttle transitions and sustained high boost scenarios typical in modified LSX engines.