Cometic GM LS1 SB 3.910 inch Bore .036 inch MLS Head Gasket

This Cometic Multi-Layer Steel (MLS) head gasket is built with a compressed operating thickness of 0.036 inches and a 3.910-inch bore, making it a solid choice for many GM LS Gen-3/4 small block V8 engines. The multi-layer steel construction offers increased strength and the ability to rebound, helping it resist corrosion and withstand the forces between aluminum and cast iron blocks. The outer layers are embossed and coated with Viton, a heat-resistant rubber material designed to handle tough sealing environments and various surface finishes without needing additional sealants.

Because it's made from multiple layers of stainless steel, this gasket provides maximum sealing performance, which is crucial for high-output engines. The center shim layer is uncoated stainless steel and can be varied to achieve different thickness requirements, though this specific gasket is set at 0.036 inches. This design is well-suited for applications using either aluminum heads with aluminum blocks or aluminum heads with cast iron blocks, as it can handle the shearing forces that can occur between dissimilar metals.

This gasket fits a wide range of GM vehicles, including popular models like the Chevrolet Corvette, Silverado 1500, and Tahoe, as well as GMC Sierra 1500 and Cadillac CTS. It's a well-built component designed for reliable sealing in demanding applications.