Cometic GM LS1 SB 3.970 inch Bore .045 inch MLS Head Gasket

When you're rebuilding the top end of your GM LS Gen-3 or Gen-4 small block V8, you need a head gasket that can handle the pressure. This Cometic Multi-Layer Steel (MLS) head gasket is built for that job. It features a 3.970-inch bore and a compressed thickness of 0.045 inches, designed to seal effectively in high-output applications.

Cometic constructs these MLS gaskets from multiple layers of stainless steel, which gives them increased strength and the ability to rebound, helping them resist corrosion. The outer layers are coated with Viton, a heat-resistant rubber material that can handle tough sealing environments and various surface finishes. This construction means you don't need to use any additional sealants, and it works well whether you're pairing aluminum heads with an aluminum block or an iron block. The center layer is also stainless steel, allowing for precise thickness control.

This gasket fits a wide range of GM vehicles, including popular models like the Chevrolet Corvette, Silverado, and Tahoe, as well as GMC Sierra and Cadillac CTS. It's a solid option for anyone looking for reliable sealing performance in their LS engine build.