dude, if u would hear this car with it on, you would know y i want this exhaust! he has nothing done to the car. stock manifold, stock cat, tsudo exhaust! thats it. no engine mods no nothing, and its the best sounding exhaust ive ever heard. after i get the headers, cat,......etc, it will sound hellish awesome! tsudo may not be "the best," but this shit blows anything ive ever heard away!