4.200 MLS Head Gasket .060 - Pontiac 400-455

The 4.200 MLS Head Gasket .060 - Pontiac 400-455 by Cometic Gaskets is an essential component for serious engine builders and restorers working on classic Pontiac big-block powerplants. This gasket is designed for those who are either freshening up a Pontiac 400 engine, stroking it to a 455, or upgrading an existing engine to handle higher compression and boost levels.

Constructed from Multi-Layer Steel (MLS), this gasket provides superior sealing capabilities compared to traditional materials. The layered steel design, combined with elastomer coatings, allows for expansion and contraction during thermal cycling, ensuring reliability under varying temperatures and pressures. The .060-inch thickness is specifically engineered to accommodate standard deck heights and common machining tolerances.

This head gasket is ideal for both stock and modified Pontiac engines, making it suitable for street machines, show cars, and weekend warriors. With a bore diameter of 4.200 inches, it aligns perfectly with Pontiac 400-455 specifications, ensuring optimal combustion chamber volume and ring sealing integrity. Engine builders can trust this gasket to meet modern reliability standards while maintaining the integrity of classic engine architecture.