Cometic GM LS1 SB 4.130 inch Bore .045 inch MLS Head Gasket

The outer layers of this Cometic head gasket are coated with Viton, a heat-resistant rubber material rated up to 482 degrees Fahrenheit. This is a Multi-Layer Steel (MLS) gasket designed for GM LS Gen-3 and Gen-4 small block V8 engines, featuring a 4.130-inch bore and a compressed operating thickness of 0.045 inches. MLS gaskets are well-built for high-output applications because they are made from multiple layers of stainless steel, which gives them strength and resistance to corrosion. They also rebound well, helping to maintain a solid seal.

Because they are constructed from multiple layers of stainless steel, these gaskets can handle the shearing forces that occur between aluminum heads and cast iron blocks, or between two aluminum components. The Viton coating on the outer layers is specifically chosen to handle harsh sealing environments and varying load conditions. The center layer is uncoated stainless steel and can be varied to achieve different thicknesses, like the 0.045-inch compressed thickness found here. These gaskets are designed to provide maximum sealing performance and do not require additional sealants.

This gasket fits a wide range of GM vehicles, including models like the Chevrolet Silverado 1500, Cadillac CTS, and Chevrolet Corvette. It's a solid option when you need a reliable seal for your LS engine build.