4.150 MLX Head Gasket .040 GM LSX Race LH

The Cometic Gaskets 4.150 MLX Head Gasket .040 GM LSX Race LH is a precision multi-layer steel cylinder head gasket designed for high-performance LS-series engine builds. This gasket is specifically engineered for driver-side (left-hand) applications on GM LSX racing platforms, making it suitable for serious engine builders and performance enthusiasts. It is ideal for various applications, including street stroker builds, track-focused powerplants, and competition engines.

Constructed from multi-layer steel (MLS), the 4.150 bore gasket features a 0.040-inch compression thickness that optimizes piston-to-valve clearance and combustion chamber volume, which are critical for tuning and performance calibration. The design aims to ensure reliable combustion chamber sealing under extreme boost and high RPM conditions. Proper installation requires attention to head bolt torque sequencing and surface preparation, ensuring that cylinder heads and block decks are cleaned to bare metal.

This gasket is compatible with GM LS-Series engines, including LS1, LS2, LS3, LS6, and LSX platforms, making it a versatile choice for performance vehicles, circle track racers, and drag racing applications. Cometic's precision manufacturing tolerances help maintain consistent bore geometry and surface contact pressure, which can enhance gasket life in racing engines.