Cometic GM LS1 SB 4.130 inch Bore .056 inch MLS-5 Head Gasket

This Cometic Multi-Layer Steel (MLS) head gasket is built with a compressed operating thickness of 0.056 inches and a 4.130-inch bore, making it a solid choice for many GM LS Gen-3 and Gen-4 small block V8 engines. The multi-layer design uses embossed stainless steel layers for increased strength and rebound resistance, while the outer layers are coated with Viton, a heat-resistant rubber material capable of handling harsh sealing environments up to 482 degrees Fahrenheit. This construction is ideal for sealing between aluminum heads and either aluminum or cast iron blocks, as it can withstand the shearing forces that can occur between dissimilar metals. These gaskets are designed to provide maximum sealing performance for high-output engines and do not require additional sealants.

The multi-layer steel construction offers improved strength and corrosion resistance compared to traditional head gaskets. The Viton coating on the outer layers ensures a reliable seal even under demanding conditions, and the center shim layer can be varied to accommodate different thickness requirements. This gasket fits a wide range of GM vehicles, including popular models like the Chevrolet Corvette, Cadillac CTS, and Chevrolet Silverado 1500, offering a dependable sealing solution for your engine build.