well.. you might gain 1 - 5 HP.. IF THAT.
exhaust on an N/A or -stock- application isnt really going to give you any numbers worth mentioning.. its mostly for sound.. now if you have other mods such as CAI and ported manifolds / bigger throttle body and other things like that.. then a higher flowing exhaust would be a good idea- I mostly got pacesetter for sound..
plus it was free because they eff'ed up my order somehow and ended up sending my money back.. the day the money came back to my account.. the exhaust was dropped off at my front door-
havent heard from them since
later on when I get into the more serious mods, I'm definately changing my exhaust.