Cometic GM LS1 (w/M.I.D. Sleeves) 4.165 inch Bore .045 inch MLS Head Gasket

When you're rebuilding the top end of a GM LS engine, getting the head gasket right is crucial for sealing combustion pressure. This Cometic Multi-Layer Steel (MLS) head gasket is built for those high-output applications, offering a reliable seal for a range of LS Gen-3 and Gen-4 V8 engines. It's designed to handle the demands of aluminum heads on either aluminum or cast iron blocks, resisting the shearing forces that can occur between different metals.

This gasket features multiple layers of stainless steel for increased strength and corrosion resistance. The outer layers are embossed and coated with Viton, a heat-resistant rubber material that can handle temperatures up to 482°F (250°C) and works well in tough sealing environments. The compressed operating thickness is precisely 0.045 inches, and it includes Darton MID Sleeves, making it a solid option for builds requiring that specific setup. Because it's an MLS gasket, it doesn't require any additional sealants, simplifying installation.

This gasket fits a wide variety of GM vehicles, including models like the Chevrolet Camaro, Corvette, and Pontiac GTO. Always refer to the manufacturer's installation instructions for proper torque sequences and procedures.