A few of things to consider: How is he going to bend the pipes? Will they be Mandrel bent (no kinks) if not then you will lose some hp. What will it be made out of? Most if not all aftermarket systems are stainless steel. It would suck if your buddy fabricates a beautiful exhaust system for your car only to have it rust away in a few years. Otherwise I say let him do it, if you don't like how it sounds he can always weld in a set of mufflers or resonators.thanks a lot guys but here is another question for ya...a friend of mine owns a muffler shop and he wants to run 3in pipe straight back from the cats to tips...good or bad idea, it sounds kinda sketchy to me because all the ones i see that sound and perform great have a legit setup.
is that your 2010? if yes, what are those tail lights? they look slightly blacked out. i would love some of those. sounds awesome btw.get the pypes pype bomb axle back exhaust.
Pypes Pype-Bomb Axle-Back Exhaust (05-10 GT & GT500) at AmericanMuscle.com - Free Shipping!
sounds great. is inexpensive. looks great. i LOVE mine and get compliments everywhere.
YouTube - 2010 Mustang GT Takeoff With Pype Bomb Exhaust Spinning through 1st and 2nd Gears