4.200 MLX Head Gasket LH .052 GM LSX

The Cometic Gaskets 4.200 MLX Head Gasket LH .052 GM LSX is a precision cylinder head gasket engineered for left-hand applications on GM LS-series engines. This multi-layer steel gasket delivers the sealing reliability required in high-performance and stock LS-based builds, where compression thickness and bore diameter directly impact head gasket performance and longevity.

Specified at 4.200 inches bore diameter and 0.052 inches compression thickness, this gasket is designed to maintain proper clamping load and combustion sealing across the cylinder head. The .052-inch thickness is a critical specification that matches OEM and common performance rebuild standards for LSX platforms. Multi-layer steel construction provides superior heat dissipation and durability compared to single-layer designs, reducing the risk of gasket failure under sustained load or elevated cylinder pressures. Driver-side (left-hand) fitment ensures correct installation on the appropriate bank of the engine block.

This gasket is essential for engine builders, LS engine swap installations, and anyone performing cylinder head service on GM LS-series platforms. Whether rebuilding stock LS1/LS2 engines, upgrading to LS3/L92X heads, or completing a complete LSX engine refresh, correct head gasket specification prevents coolant leaks, oil contamination, and combustion bypass. Cometic's reputation in gasket manufacturing ensures consistency across production runs, making this a reliable choice for both street and performance applications requiring precision fitment and proven sealing performance.