Cometic Pontiac 400/428/455 V8 4.160in Bore .120in MLS Cylinder Head Gasket

If you're rebuilding the top end of your Pontiac 400, 428, or 455 V8 engine, 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 performance engines, offering a reliable barrier between your cylinder head and block.

Cometic's MLS design uses multiple layers of stainless steel, which gives it strength and helps it rebound to maintain sealing pressure. The outer layers are coated with Viton, a heat-resistant rubber material that can handle temperatures up to 482°F and works well with different head and block materials, like aluminum to cast iron. This gasket has a 4.160-inch bore and a compressed thickness of 0.098 inches, making it suitable for a range of Pontiac V8 applications from the late 60s through the late 70s, including models like the Bonneville, Firebird, and Grand Prix. Because it's an MLS gasket, it doesn't require any additional sealants, simplifying the installation process.