400-455 Pontiac Exhaust PORT SIZE 1.88in DIA

The FEL-PRO 400-455 Pontiac Exhaust Port Size 1.88in DIA gasket is an essential component for Pontiac engine builders and restoration enthusiasts working on 400 or 455 cubic-inch powerplants. This gasket effectively seals the junction between the cylinder head exhaust ports and the exhaust manifold, preventing leaks of combustion gases and coolant into the engine bay. Whether you're restoring a classic Pontiac muscle car or tuning a street machine, proper exhaust port sealing is crucial for optimal performance and reliability.

Engineered with advanced elastomer and composite materials, this gasket withstands extreme exhaust heat cycles while maintaining a tight, consistent seal across the 1.88-inch port diameter. Its design accommodates the thermal expansion and contraction typical of high-output Pontiac engines, effectively resisting gasket blow-out even under aggressive cam profiles and elevated boost conditions. The precise port sizing ensures full contact with both the cylinder head and manifold flange, minimizing hot spots and reducing the risk of manifold warping or cracking.

Pontiac 400 and 455 engine owners, from drag racers to vintage car restorers, rely on FEL-PRO gaskets during head gasket sets and other critical engine work. Each gasket is manufactured to OEM specifications, ensuring compatibility with original equipment exhaust manifolds and quality aftermarket alternatives. With this gasket, you can trust that your engine will maintain peak performance and reliability.