Cometic Pontiac 400/428/455 V8 .060in MLS Cylinder Head Gasket - 4.200in Bore

If you're rebuilding the top end of your Pontiac 400, 428, or 455 V8 engine, a solid set of head gaskets is crucial for a good seal. This Multi-Layer Steel (MLS) gasket from Cometic is built to handle the demands of higher output engines, ensuring a reliable seal between your cylinder heads and block without needing extra sealants.

Cometic uses multiple layers of stainless steel for increased strength and corrosion resistance. The outer layers are coated with Viton, a heat-resistant rubber material that can handle temperatures up to 482°F (250°C) and works well with different block and head materials, including aluminum-to-aluminum or aluminum-to-cast iron combinations. The center layer is uncoated stainless steel, allowing for precise thickness control. This particular gasket has a compressed thickness of .060 inches and a bore size of 4.200 inches, designed to fit a range of classic GM V8 applications like the Pontiac Firebird, Grand Prix, and LeMans from the late 60s through the late 70s.