Cometic Pontiac 400/428/455 V8 .045in MLS Cylinder Head Gasket - 4.200in Bore

This product is a Cometic Multi-Layer Steel (MLS) cylinder head gasket designed for Pontiac 400, 428, and 455 V8 engines. It has a compressed operating thickness of 0.045 inches and is built for a 4.200-inch bore. This gasket is suitable for a range of vehicles, including models like the Pontiac Firebird, Catalina, and LeMans from the late 60s through the late 70s.

Cometic MLS head gaskets are constructed from multiple layers of stainless steel, offering increased strength and resistance to corrosion. The outer layers are coated with Viton, a heat-resistant rubber material that can handle harsh sealing environments and various surface finishes. This construction means the gasket seals effectively without needing additional sealants, making it a solid choice for both aluminum-to-aluminum and aluminum-to-cast iron block configurations. The center layer is uncoated stainless steel, allowing for precise thickness control.