GM 2.5 642R NEW FULL
ProMaxx Performance designed/developed this cylinder head from the GM 2.5 642R casting. This a new aftermarket head that is a direct bolt on replacement. This head has been cast thicker than OEM specs for better quality. This casting works for the GM 642 casting only.
Century, Astro, Celebrity, LLV, S10 Pick Up , S15 Pick Up, Safari, Oldsmobile Cutlass Calais, Cutlass Ciera, Cutlass Cruiser, Pontiac 6000, Fiero
Engine Size: 2.5L
Cast #: 642