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.

1988-91
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