Pontiac 350/400/428/455 Valley Pan Gasket

The FEL-PRO Pontiac 350/400/428/455 Valley Pan Gasket (part number PS 50045 C) is a cork and rubber composite engine side plate gasket engineered for Pontiac V8 engines across multiple displacement generations. This gasket seals the critical valley pan area between the cylinder head and engine block, preventing oil seepage that can accumulate debris and compromise engine cleanliness during extended operation.

FEL-PRO's cork-rubber construction provides superior conformability to casting irregularities common in vintage Pontiac engine blocks while maintaining dimensional stability under thermal cycling. The material composition resists oil penetration and adheres reliably to both cast iron and aluminum surfaces. At 0.4 lbs, this is a direct replacement gasket requiring no modification, with overall dimensions of 12.3 x 22.05 inches to fit the full valley pan footprint across the 350, 400, 428, and 455 cubic inch displacement families.

Restoration and performance builders working on second-generation and third-generation Pontiac muscle cars rely on this gasket to eliminate persistent valley pan leaks that are notorious in high-mileage engines. Whether undertaking a complete engine rebuild, upper-end refreshing, or preventive maintenance on a stock or modified Pontiac V8, proper valley pan sealing is essential to keeping oil where it belongs—inside the engine. This is a single gasket unit sold individually, suitable for one engine application.