Cometic GM LS1 SB 4.060 inch Bore .027 inch MLS Head Gasket

This is a Cometic Multi-Layer Steel (MLS) head gasket designed for GM LS Gen-3 and Gen-4 small block V8 engines. It features a 4.060 inch bore and a compressed thickness of .027 inches, making it suitable for a wide range of GM vehicles. MLS gaskets are built with multiple layers of stainless steel, which gives them strength and resistance to corrosion. They are also designed to handle the forces created when mating aluminum heads to cast iron blocks, or aluminum to aluminum. This construction means they don't require any additional sealants for installation.

The outer layers of this gasket are coated with Viton, a heat-resistant rubber material that can handle temperatures up to 482 degrees Fahrenheit. This coating helps create a reliable seal even in demanding conditions and on various surface finishes. The center layer is uncoated stainless steel and can be varied in thickness to meet different engine build requirements. These gaskets are a popular choice for high-output engines because of their robust construction and sealing capabilities.