Talk to Calvin Elston (704.821.4494
Calvin@elstonheaders.com) about headers, both stepped and Tri-Y. In our SBC there was a .13 gain with no other changes. We never dynoed the SBC headers as they would not fit on the dyno. However, the BBC showed an AVERAGE increase from Stahl heades of 14 HP, 13 ftlbs tq from 6000-7500 on a DTS dyno.
Bill