Cometic GM L18 Vortec 8100 Gen-VII Big Block V8 .027in MLS Cylinder Head Gasket - 4.280in Bore - LHS

If you're rebuilding the top end of your GM L18 Vortec 8100 Gen-VII Big Block V8, a reliable head gasket is crucial for sealing combustion pressure and coolant. This Multi-Layer Steel (MLS) gasket from Cometic is built to handle the demands of these powerful engines, offering a solid seal without needing extra sealants.

Cometic constructs these gaskets with multiple layers of stainless steel for increased strength and corrosion resistance. The outer layers are coated with Viton, a heat-resistant rubber material that can handle tough sealing environments and various surface finishes, making it suitable for both aluminum and cast iron blocks. The center layer is stainless steel and can be varied to achieve different compressed thicknesses, like the .027 inch on this particular gasket, which has a 4.280 inch bore diameter. This design helps prevent shearing forces when mating different block and head materials.

This gasket fits a range of heavy-duty Chevrolet and GMC trucks and SUVs from the early 2000s, including models like the Silverado 2500 HD and Yukon XL 2500. It's a well-built component designed for maximum sealing performance in high-output applications.