Cometic GM Gen-V/VI Big Block V8 .045in MLS Cylinder Head Gasket - 4.630in Bore

This Cometic Multi-Layer Steel (MLS) head gasket is built with a compressed operating thickness of 0.045 inches and a 4.630-inch bore, making it a solid choice for GM Gen-V/VI Big Block V8 engines. These gaskets are constructed from multiple layers of stainless steel, which helps them rebound and resist corrosion, while the outer layers are coated with Viton, a heat-resistant rubber material capable of handling temperatures up to 482 degrees Fahrenheit. This advanced construction means they seal exceptionally well without needing additional sealants, and they can handle the stresses between aluminum heads and cast iron blocks.

The multi-layer design provides increased strength, and the Viton coating on the outer layers is designed to perform in harsh sealing environments and under various load conditions. The center shim layer is stainless steel and can be varied to achieve different thickness requirements, like the 0.045 inches found in this particular gasket. This makes them a reliable option for high-output engines where sealing performance is critical. They are suitable for use with both aluminum heads on aluminum blocks and aluminum heads on cast iron blocks.