LS3/L92 MLS Head Gasket - 4.080 Bore x .051

The LS3/L92 MLS Head Gasket – 4.080 Bore x .051 from Chevrolet Performance is a precision-engineered cylinder head gasket designed for high-performance LS-series engine builds. This multi-layer steel gasket is engineered to seal the critical interface between the cylinder head and engine block, preventing coolant and combustion leakage in demanding applications. Whether you're rebuilding a stock LS engine or upgrading an existing platform, this OEM-specification gasket ensures reliable sealing under boost, high RPM, and elevated operating temperatures.

Multi-layer steel (MLS) construction provides superior strength and conformability compared to traditional composite gaskets, allowing it to maintain an effective seal even with varying surface finishes and thermal expansion cycles. The 4.080-inch bore diameter is specifically matched to LS3 and L92 cylinder head specifications, while the 0.051-inch compression thickness is calibrated to deliver the correct static compression ratio and maintain proper head gasket clamping load when torqued to specification. This gasket resists blow-by, coolant intrusion, and oil seepage across the full operating envelope of these potent LS powerplants.

Professionals and enthusiasts rebuilding LS3 or L92 engines—whether for naturally aspirated street performance, supercharged applications, or race use—depend on this gasket to maintain a reliable seal throughout the engine's lifespan. Installation requires proper head bolt torque sequencing and the use of ARP or OEM head fasteners to achieve uniform clamping pressure across the gasket surface. One gasket is supplied per order; dual overhead cam LS engines require two gaskets (one per cylinder head). Always replace this gasket during any cylinder head removal to ensure optimal sealing integrity.