He just has large pipes and a large diameter muffler. You can give an import a lower tone by doing the same thing. So much pipe that it comes out in pulses instead of a steady fart can, gives it that truck or power sound. Its no where near what a real v8 sounds like, but its deffinatly lower. Get the dual, youl be happy, and if u mod ur motor much, it will prob give ya a few extra ponys too, casue i belive a dual outlet will just be a bottle neck after a while.