Cometic GM LS1 (w/M.I.D. Sleeves) 4.125 inch Bore .036 inch MLS Head Gasket

Starting with the Viton rubber coating on the embossed stainless steel outer layers, this Cometic Multi-Layer Steel (MLS) head gasket is built to handle the demands of high-output GM LS engines. It's designed for a 4.125 inch bore and has a compressed thickness of just .036 inches, making it suitable for a wide range of GM LS Gen-3 and Gen-4 V8 applications, including models like the Chevrolet Camaro, Corvette, and Cadillac CTS. The inclusion of Darton MID Sleeves further enhances its sealing capabilities.

The multi-layer steel construction itself offers increased strength and resistance to corrosion, allowing these gaskets to perform well when mating aluminum heads to either aluminum or cast iron blocks, effectively managing the shearing forces that can occur between dissimilar metals. Because they are made of multiple layers of stainless steel, they have the ability to rebound and maintain a strong seal without the need for additional sealants, which is a significant advantage for engine builders looking for a reliable seal right out of the box.

This gasket is a solid option for anyone rebuilding the top end of their GM LS engine. The Viton coating is heat resistant up to 482 degrees Fahrenheit, ensuring it can withstand harsh sealing environments and varying load conditions.