3.945 MLS Head Gasket - .053 SBC LS1 RH

The 3.945 MLS Head Gasket - .053 SBC LS1 RH from FEL-PRO is an OEM-quality replacement designed for small-block Chevrolet and LS1 engine builds requiring precise cylinder head sealing. This right-hand gasket is essential for builders and mechanics tackling high-performance engine assembly, stroker builds, or complete cylinder head replacement on classic and modern small-block platforms.

FEL-PRO's multilayer steel (MLS) construction delivers superior sealing performance compared to traditional composition gaskets, with the .053-inch compressed thickness engineered to accommodate stock or modified combustion chamber volumes. The MLS design uses multiple layers of spring-tempered steel with elastomer coating to resist blow-by, coolant leakage, and detonation stress—critical for boosted applications, nitrous systems, or high-compression builds running pump gas or race fuel.

This gasket is ideal for experienced engine builders, professional shops, and serious enthusiasts performing complete top-end work on small-block platforms. The 3.945-inch bore diameter and right-hand configuration ensure proper fitment with matching cylinder head and block deck surfaces, maintaining optimal compression ratio and preventing cross-gasket leakage that can degrade engine performance or cause catastrophic failure.