Cometic GM LS1 SB 3.910 inch Bore .060 inch MLS-5 Head Gasket

This Cometic Multi-Layer Steel (MLS) head gasket is built with a compressed operating thickness of 0.060 inches and a 3.910-inch bore, making it a solid choice for many GM LS Gen-3 and Gen-4 small block V8 engines. The gasket's construction features multiple layers of stainless steel, which gives it strength and the ability to rebound, while also resisting corrosion. The outer layers are coated on both sides with Viton, a heat-resistant rubber material capable of handling temperatures up to 482 degrees Fahrenheit, ensuring a strong seal even in demanding conditions.

MLS gaskets are well-suited for applications using aluminum heads with either aluminum or cast iron blocks, as they can handle the shearing forces that can occur between different metals. The center layer is uncoated stainless steel and can be varied to achieve different thicknesses, like the 0.060-inch specification on this particular gasket. Because of their robust construction, these gaskets do not require any additional sealants, simplifying the installation process. This gasket fits a wide range of GM vehicles, including models like the Chevrolet Corvette, Cadillac CTS, and GMC Sierra 1500.