Exhaust Manifold Gasket Set Pontiac V8 400/455

The FEL-PRO Exhaust Manifold Gasket Set MS 90111 is a matched pair of multi-layer steel gaskets engineered for Pontiac V8 400 and 455 engine applications. These 1.845-inch round port gaskets seal the critical interface between the cylinder head and exhaust manifold, preventing exhaust leakage that compromises engine efficiency and increases underhood emissions. FEL-PRO gaskets are manufactured to OEM specification and designed to withstand the thermal cycling and pressure cycles inherent to high-displacement V8 operation.

Multi-layer steel construction provides superior durability compared to composite materials, particularly in engines subjected to sustained heat and vibration. The gasket set accounts for the port geometry of the Pontiac 400/455 block and head combination, ensuring a conforming seal without binding or hot-spot erosion. Proper gasket seating depends on correct manifold torque sequence and cleanliness of mating surfaces—critical considerations for any head or manifold service on these classic powerplants.

This gasket set is specified for original Pontiac 400 and 455 V8 platforms and is essential during manifold replacement, engine rebuild, or gasket renewal on vintage muscle cars, hot rods, and marine applications using these engines. Technicians and engine builders working on Pontiac performance restorations rely on FEL-PRO's dimensional accuracy to eliminate repeat failures and ensure long-term reliability.

FEL-PRO (Federal-Mogul) has maintained automotive gasket manufacturing credentials for decades, serving both OEM and aftermarket channels. The MS 90111 carries part number specificity tied directly to Pontiac engine architecture, reinforcing its application integrity for users building or maintaining authentic Pontiac V8 combinations.