Cometic GM L18 Vortec 8100 Gen-VII Big Block V8 .080in MLS Cylinder Head Gasket - 4.280in Bore - RHS

This is the Cometic Multi-Layer Steel (MLS) cylinder head gasket for GM L18 Vortec 8100 Gen-VII Big Block V8 engines. It's designed with a 4.280-inch bore and a thickness of .080 inches, making it a solid option for rebuilding or repairing these powerful V8s. This gasket fits a range of Chevrolet and GMC trucks and SUVs from the early 2000s, including models like the Chevrolet Silverado 2500 HD and GMC Sierra 3500.

Cometic builds these gaskets using multiple layers of stainless steel for increased strength and resistance to corrosion. The outer layers are coated with Viton, a heat-resistant rubber material that can handle temperatures up to 482 degrees Fahrenheit. This coating helps ensure a strong seal against the cylinder head and block, even with aluminum heads on cast iron blocks, and it means you don't need to use any additional sealants during installation. The compressed operating thickness is .098 inches, which is important to consider when reassembling your engine.