4.100 MLS Head Gasket .051 GM LS

The 4.100 MLS Head Gasket .051 GM LS from Cometic Gaskets is engineered for serious LS engine builders and performance enthusiasts who demand reliability in high-horsepower applications. This gasket is purpose-built for the LS platform, America's most popular modern V8 engine family, and serves as a critical seal between the cylinder head and engine block. Whether you're assembling a stock rebuild, a mild street engine, or a competition-level stroker, a quality head gasket is non-negotiable for preventing coolant and oil leakage, maintaining cylinder pressure, and ensuring long-term engine durability.

Cometic's multi-layer steel (MLS) construction uses a proprietary design that combines elastomer layers with solid steel shims to provide superior gasket conformability and sealing performance across varying clamping loads. The .051-inch thickness is specifically designed for the 4.100-inch bore diameter, a common specification for stock LS configurations and many performance builds. MLS gaskets excel at managing thermal cycling, resisting deformation under sustained boost pressure, and maintaining seal integrity across extended engine runtime—critical advantages over traditional composite gaskets in turbocharged, supercharged, or nitrous-fed applications. The gasket's construction allows it to self-conform to minor surface variations in modern honed decks, reducing the risk of gasket failure from head lift or micro-movement during peak combustion events.

This gasket is ideal for anyone rebuilding or modifying LS-equipped vehicles—Chevrolet Corvette, Camaro, Silverado, GMC Sierra, Cadillac CTS-V, and countless swap platforms. Proper installation requires torque-to-yield head bolts applied in the manufacturer's specified sequence and angle, along with a clean, resurfaced deck and cylinder head to specification. The 4.100 bore and .051 thickness make this the correct choice for standard LS1, LS6, and comparable street and race builds; always verify your engine's bore diameter and OEM gasket thickness before ordering to ensure correct fitment.