Cometic Pontiac 400/428/455 V8 .045in MLS Cylinder Head Gasket - 4.300in Bore

This Cometic Multi-Layer Steel (MLS) head gasket is built with multiple embossed layers of stainless steel, featuring an outer coating of Viton rubber. This construction is designed to handle the high output of Pontiac 400, 428, and 455 V8 engines, offering a compressed operating thickness of 0.027 inches and a 4.300-inch bore. MLS gaskets are ideal for sealing aluminum heads to aluminum blocks, or aluminum heads to cast iron blocks, as they can effectively manage the shearing forces that arise between dissimilar metals.

The strength of these MLS gaskets comes from their layered stainless steel construction, which also allows them to rebound and resist corrosion. The Viton coating on the outer layers is a heat-resistant material capable of withstanding temperatures up to 482 degrees Fahrenheit, making it suitable for harsh sealing environments and various load conditions. The uncoated stainless steel center layer can be varied to achieve different thickness requirements, and this particular gasket is set at 0.045 inches. These gaskets do not require additional sealants for installation.

This gasket fits a range of classic Pontiac, Buick, and Oldsmobile V8 engines from the late 60s through the late 70s, including popular models like the Pontiac Firebird, Grand Prix, and LeMans. Ensure you check the full fitment list to confirm compatibility with your specific vehicle.