Cometic GM L18 Vortec 8100 Gen-VII Big Block V8 .040in MLS Cylinder Head Gasket - 4.280in Bore - LHS

This Cometic Multi-Layer Steel (MLS) head gasket is built with a compressed operating thickness of 0.040 inches and a 4.280-inch bore, specifically for the left side of GM L18 Vortec 8100 Gen-VII Big Block V8 engines. These gaskets are a solid choice for high-output engines because they offer maximum sealing performance without needing any additional sealants. They are well-suited for applications where aluminum heads meet either aluminum or cast iron blocks, as they can handle the shearing forces that can occur between these different materials.

The construction features multiple layers of stainless steel, which not only increases strength but also allows the gasket to rebound and resist corrosion. The outer layers are embossed and coated on both sides with Viton, a heat-resistant rubber material that can handle temperatures up to 482 degrees Fahrenheit and meet the demands of harsh sealing environments. The center layer is uncoated stainless steel, and its thickness can be varied to achieve different gasket thicknesses, like the 0.040 inches on this particular gasket.

This gasket is designed to fit a range of heavy-duty GM trucks and SUVs, including models like the Chevrolet Silverado 2500 HD and GMC Yukon XL 2500. It's a well-built component that helps ensure a reliable seal for your engine's top end.