Cometic Pontiac 400/428/455 V8 .027in MLS Cylinder Head Gasket - 4.300in 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 4.300-inch bore and a compressed thickness of 0.027 inches. This gasket is built with multiple layers of stainless steel for increased strength and rebound resistance, making it a solid choice for high-output engines. The outer layers are coated with Viton, a heat-resistant rubber material that can handle demanding sealing environments and various surface finishes, ensuring a good seal without needing additional sealants.

MLS gaskets are well-suited for applications with aluminum heads on either aluminum or cast iron blocks, as they can manage the shearing forces that can occur between different metals. The center layer is uncoated stainless steel, allowing for variations in thickness to meet specific engine requirements. This construction offers improved sealing performance and corrosion resistance.

This gasket fits a range of vehicles, including models like the Pontiac Firebird, Grand Prix, and LeMans from the late 1960s through the late 1970s, as well as some Buick and Oldsmobile models from 1975. It's designed for a direct fit on the specified Pontiac V8 engines.