thanks man...it was a long hard road for me to be able to say my truck runs 12's..cool thing is, bottom end is still original stock (block, pistons and crank) with over 232k miles on it... tuners, the proven ones like superchips and diablo do make a difference. It's not so much by themselves but with the addition of other mods like cai and exhaust, it gets the most out of them...I've run both and I have no bad things to say about either, the advantage of the diablo is custom tuning if you so desire. As for cai, I'd get a Bfi/ramhammer if you can find one (not made anymore..at least for now
), the Vararam is right up there as well. Volant and S&B is pretty good as well.