I bet the flip would come out " heads " .......get it :rollinglaugh: :rollinglaugh: :rollinglaugh: :rollinglaugh:
I can't say that I speak from experience, however the twisted wedge heads have been out forever, and at one time were the head to have. They did have problems with the valve guides wearing out extremely quickly back in the day, I would guess that this problem has been addressed, but It would be worth checking into prior to installing the heads.
HAved used them and they're an awesome head... AFR though just gets awesome reviews from everryone so whichever one you can ifnd cheaper gets my vote..but I've said it before and I'll say it again...TRICK FLOW is just cool to say/
i personally have gt40X heads that are basicly fully ported and they flow damn good, i have heard people talk nothin but good things about trickflow, but i've also heard even more people say better thing about AFR