Originally Posted by Everett
Shortys don't do any better than the stock manifolds so basically long tubes or don't bother. A tuner is a must have anyway so ya pick one up. American muscle has the best deal going with free tunes for life so start there. I personally love Mac but it's a personal preference. You are gonna have to research which ones will clear your tranny if it's an auto. Happy driving
Built 2 Last TTT
Everett , I so disagree
I have a good friend with a shop , dyno etc .. so i've spent time around the dyno with these guys and a good set of shorty's DOES Make power and ARE better than manifolds .... in some cases very little , like my Mach 1 for instance they really don't make a great set of shorty's for a 4 valve .. you may get 3 to 5 horse , but again that's better than your stock manifold , but not worth the money in my case /// I have a friend with an 07 PJ Saleen , he put JBA shorty's on it and they dyno tuned it and got 13 horses !!
Hell I have a 2006 4.0 we put shorties and duals on and i got 23 rwhp at the peak ,your not gonna tell me that was just from the Dual exhaust ?
YES Long tubes are way better , but a GOOD set of shorties is worth some power .....