Cometic GM LS1 SB 4.060 inch Bore .089 inch MLS-5 Head Gasket

This product includes one Cometic Multi-Layer Steel (MLS) head gasket, designed for GM LS Gen-3/4 small block V8 engines. It features a 4.060 inch bore and a compressed operating thickness of 0.089 inches. This gasket is built with multiple layers of stainless steel for increased strength and rebound resistance, making it ideal for high-output engines. The outer layers are coated with Viton, a heat-resistant rubber material that can handle demanding sealing environments and various surface finishes, ensuring a reliable seal without the need for additional sealants.

The MLS construction is particularly beneficial when mating aluminum heads to aluminum blocks or aluminum heads to cast iron blocks, as it can withstand the shearing forces that can occur between these different materials. The center shim layer is uncoated stainless steel and can be varied to achieve different thickness requirements. This gasket is a solid option for rebuilding or upgrading the top end of your engine, offering improved sealing performance for both aluminum and cast iron engine blocks.

This gasket fits a wide range of GM vehicles, including models like the Chevrolet Silverado 1500, Chevrolet Corvette, and Cadillac CTS. Always refer to the manufacturer's installation instructions for specific details regarding your application.