Cometic GM / Mercury 8.1L 496ci 4.350in Bore .051in MLS RH Head Gasket

Cometic's Multi-Layer Steel (MLS) head gaskets start with a solid foundation: multiple layers of stainless steel that offer increased strength and the ability to rebound, resisting corrosion. The outer layers are embossed and coated with Viton, a heat-resistant rubber material capable of handling temperatures up to 482°F (250°C), making them suitable for a variety of demanding sealing environments and surface finishes.

This particular gasket, the C5762-051, is for the right-hand side and has a compressed operating thickness of 0.051 inches with a 4.350-inch bore. It's built for high-output GM and Mercury 8.1L (496ci) Big Block V8 engines, including the L18 Vortec Gen-VII. These MLS gaskets are designed to provide maximum sealing performance without needing additional sealants, and they work well with both aluminum-to-aluminum and aluminum-to-cast iron block combinations, handling the shearing forces that can occur between different metals.

This gasket fits a range of heavy-duty trucks and SUVs, such as the Chevrolet Silverado 2500 HD and GMC Yukon XL 2500, from the early 2000s through 2007. It's a well-built component for rebuilding or repairing the top end of these powerful engines.