Cometic GM LS1 SB 4.100in Bore .060in MLS-5 Head Gasket

This Cometic Multi-Layer Steel (MLS) head gasket is built with multiple embossed layers of stainless steel, featuring an outer coating of Viton rubber. The compressed operating thickness is .060 inches, and the bore size is 4.100 inches, making it suitable for a wide range of GM LS Gen-3/4 small block V8 engines, including popular models like the Chevrolet Corvette and Cadillac CTS. These gaskets are designed to provide maximum sealing performance for high-output engines and are ideal for applications using aluminum heads with either aluminum or cast iron blocks, as they can handle the shearing forces that arise from dissimilar metals.

The strength of MLS gaskets comes from their multiple stainless steel layers, which also allow them to rebound and resist corrosion. The Viton coating on the outer layers is a heat-resistant elastomer capable of withstanding temperatures up to 482 degrees Fahrenheit (250 C), ensuring a reliable seal in demanding conditions and across various surface finishes. The center shim layer is uncoated stainless steel and can be varied to achieve different thickness requirements, like the .060 inch specification on this particular gasket.

Because they are designed for high-output engines and are made from robust materials, these Cometic head gaskets do not require any additional sealants. They are a solid option for rebuilding the top end of your engine, offering improved sealing and durability.