Cometic GM LS Gen-3/4 Small Block V8 .066in MLX Cylinder Head Gasket - 4.040in Bore

If you're rebuilding the top end of a GM LS Gen-3 or Gen-4 small block V8, getting the cylinder head gasket right is crucial for a strong seal. This Cometic MLX head gasket is built to handle the demands of higher output engines, ensuring your engine stays sealed up tight.

This gasket uses a Multi-Layer Steel (MLS) construction, which means it's made of several layers of stainless steel. This design gives it increased strength and the ability to rebound, helping it resist corrosion and handle the forces created when mating aluminum heads to either aluminum or cast iron blocks. The outer layers are coated with Viton, a heat-resistant rubber material that can handle temperatures up to 482 degrees Fahrenheit, making it suitable for tough sealing jobs. The center layer is stainless steel and can be varied to achieve different thicknesses, like the .066 inch compressed thickness on this particular gasket, which is designed for a 4.040 inch bore.

Because these are MLS gaskets, they don't require any additional sealants, which simplifies installation. They fit a wide range of GM vehicles, including models like the Chevrolet Silverado, Cadillac Escalade, and Buick LaCrosse, making them a solid option for many LS engine builds.