Cometic GM LS1 SB 4.160 inch Bore .040 inch MLS Head Gasket

When you're rebuilding the top end of your GM LS Gen-3 or Gen-4 small block V8, getting the cylinder head gasket seal right is critical. This Multi-Layer Steel (MLS) head gasket from Cometic is built to handle the demands of high-output engines, ensuring a solid seal between your cylinder head and block without needing extra sealants. It's designed to work well whether you're pairing aluminum heads with an aluminum block or aluminum heads with a cast iron block, resisting the shearing forces that can occur between different metals.

Cometic constructs these gaskets with multiple layers of stainless steel for increased strength and rebound resistance, which also helps prevent corrosion. The outer layers are coated with Viton, a heat-resistant rubber material that can handle tough sealing conditions and various surface finishes, up to 482 degrees Fahrenheit. The center layer is stainless steel and can be varied in thickness; in this case, it's set to achieve a compressed operating thickness of 0.040 inches, with a bore size of 4.160 inches, making it suitable for a wide range of GM LS applications.