I have the Evo II myself, and it sounds so good. It's very low, and you can almost control its sound by the way you drive. When I want people to know I have it, I can put my foot in it, and you hear this low even hummmm come up out of nowhere. If i'm on I-95 though, and I don't want to have it droning in my ear all the time, I can just let off of it a tad, and i don't even know it's there. Its one of the best sounding 4-cyl exhausts I've ever heard.