It performs as good if not better than most others, with 60mm mandrel bent piping you can't really go wrong. I have one on my 2nd gen teg and i felt a nice little bump in power, nothing huge, when i put it on. And it sounds beautiful. According to their testing, it's quieter than stock at idle but has a nice little growl to it at higher rpm. I can drive on the highway with it without annoying any passengers, but it still sounds mean at the same time.