Speed Pro/ Seal Power piston question

[MAURICE BLENDHEIM]

Originally Posted by SDT1DYI

Are the SBC Speed Pro/ Seal Power pistons specified as the NHRA approved replacement pistons, FORGED aluminum or are they Hypertic silicone aluminum?
Anybody know for sure???

SDT1DYI ? … Realistically the new Speed-Pro / Sealed Power pistons are not what they use to be. In several cases we have found them to be quite heavy and sizing to be inconsistent. In regards to Forged or Hypereutectic it depends on the accepted part number. In one case I ordered a forged part number and the pistons arrived with the correct number etched into the tops, but were Hypereutectic. MB