Originally posted by robinj
I'd actually be more interested if anyone has mentioned a thing yet about midrange gains. I'm not a dragger, so generally top-end numbers don't appeal much.

the step tube header that I will be building for the 420a, will definately produce a strong mid range pull, the step tube header by design gives you the best of both worlds, it gives you a very broad tq curve, with an awesome top end charge, this header should pull strong from 2500rpm all the way to red line thanx Jason