Cometic GM / Mercury 8.1L 496ci 110.49mm .040 inch MLS LHS Head Gasket

If you're rebuilding the top end of your GM or Mercury 8.1L 496ci engine, a solid head gasket is crucial for sealing combustion pressure. This Cometic Multi-Layer Steel (MLS) head gasket is specifically for the left side (LHS) of your engine and features a 4.350-inch bore with a compressed thickness of 0.040 inches. It's designed to handle the demands of high-output engines, ensuring a reliable seal between your cylinder head and block.

Cometic builds these gaskets with 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 tough sealing environments and varying surface finishes. This construction makes them suitable for combinations of aluminum heads with aluminum or cast iron blocks, as they can manage the stresses that arise from dissimilar metals. Because they're MLS, they don't require any additional sealants, simplifying installation.

This gasket fits a range of popular trucks and SUVs, including the Chevrolet Suburban 2500, GMC Sierra 2500 HD, and Chevrolet Silverado 2500 HD, from the early 2000s through 2007. Make sure you're ordering the correct gasket for the left side of your specific engine application.