Cometic Pontiac 400/428/455 V8 .086in MLS Cylinder Head Gasket - 4.300in Bore

If you're rebuilding the top end of your Pontiac V8, like a 400, 428, or 455, getting the head gaskets right is crucial for a solid seal. This Multi-Layer Steel (MLS) gasket from Cometic is built to handle the demands of these classic engines, ensuring a reliable seal between your cylinder heads and block.

This gasket uses multiple layers of stainless steel for increased strength and resistance to corrosion. The outer layers are coated with Viton, a heat-resistant rubber material that can handle high temperatures up to 482°F (250°C) and works well with different block and head materials, including aluminum and cast iron. The compressed thickness is .036 inches, and it's designed for a 4.300-inch bore, making it suitable for a range of Pontiac V8 applications from the mid-60s to the late-70s, including models like the Bonneville, Catalina, and Firebird. Because it's an MLS design, it doesn't require any additional sealants, simplifying the installation process.