Originally posted by adeelpowers
This is what I heard based on feedback from others, though I have yet to see a dyno plot to prove it.
Some say that their dyno "butt" feels like there's slightly a better high end but a slight drop in the low end.
In my opinion, I don't think you gain any, it's a psychological thing. Your money is better spent on a newer exhaust system which is lighter overall (reduce unsprung weight) and has a better finish to it with improved sound.