Cometic GM LS1 SB 3.910 inch Bore .040 inch MLS Head Gasket

This is a single Cometic Multi-Layer Steel (MLS) head gasket designed for GM LS Gen-3/4 small block V8 engines. It features a 3.910 inch bore and a compressed operating thickness of .040 inches. The gasket is constructed from multiple layers of stainless steel, with the outer layers coated in Viton, a heat-resistant rubber material. This construction helps it handle the demands of high-output engines and provides a reliable seal between aluminum and cast iron engine blocks without needing additional sealants.

The multi-layer design offers increased strength and resistance to corrosion, while the Viton coating on the embossed outer layers ensures it can meet the challenges of various sealing environments and surface finishes. The center layer is uncoated stainless steel and can be varied to achieve different thicknesses. This gasket is suitable for a wide range of GM vehicles, including models like the Chevrolet Camaro, Corvette, and Silverado, as well as GMC Sierra and Cadillac CTS.