4.125 MLS Head Gasket .051 - GM LSX RH

The 4.125 MLS Head Gasket .051 - GM LSX RH from Cometic Gaskets is a precision-engineered component designed for high-performance LSX engine builds and restorations. This gasket serves as the critical seal between the right-side cylinder head and engine block, preventing coolant and oil cross-contamination while maintaining compression integrity under extreme operating conditions. Built for serious enthusiasts and professional mechanics tackling LSX swaps, turbo applications, and naturally aspirated performance builds, this right-hand head gasket is an indispensable upgrade for anyone seeking reliability in a modified powerplant.

Cometic's Multi-Layer Steel (MLS) construction delivers superior sealing performance compared to traditional composite gaskets, with the .051-inch thickness engineered to achieve optimal clamp load distribution across the 4.125-inch bore diameter. MLS gaskets utilize multiple stainless steel layers with elastomer coatings to provide consistent gasket crush and recovery, crucial for maintaining a tight seal across thermal cycling and boost events. The precision-stamped design ensures proper alignment with LSX head bolt patterns while accommodating modern porting and combustion chamber modifications without compromise to structural integrity or sealing surface contact.

This right-hand head gasket is essential for any LS-based engine platform requiring factory or upgraded cylinder head replacement, whether you're rebuilding stock displacement or running a turbo or supercharger package. Installation requires proper head torque sequencing and appropriate fastener specifications—always consult your engine builder's documentation for correct bolt patterns and clamping procedures. Pairing this Cometic gasket with quality head bolts, proper surface preparation, and correct installation torque sequences ensures years of leak-free operation and maintains the pressure integrity your modified LSX platform demands.