4.100 MLS Head Gasket - .041 SBC LS1 LH

The FEL-PRO 4.100 MLS Head Gasket – .041 SBC LS1 LH is designed for small-block Chevy and LS1 engine builders seeking reliability in both high-performance and stock-displacement applications. This gasket is crucial for sealing the combustion pressure, coolant passages, and oil galleries between the cylinder head and engine block, especially under extreme thermal and mechanical stress.

Constructed from multi-layer steel (MLS), this gasket features precisely stamped steel layers bonded to a composite core, providing superior conformability and reusability compared to single-layer or cork gaskets. The .041-inch thickness is suitable for 4.100-inch bore applications, ensuring proper gasket crush and maintaining critical combustion chamber volume tolerances. MLS gaskets are particularly effective under boost, nitrous, and high-RPM loads, as the steel layers resist blowout and maintain sealing force across varying temperatures.

Ideal for street engines, mild-to-wild carbureted builds, fuel-injection conversions, and forced-induction projects, this gasket is compatible with SBC and LS platforms. The left-hand (LH) designation indicates the correct fitment for specific cylinder head orientations and port configurations, ensuring optimal performance for your engine build.