with stock exaust all i herd was the motor clackin. with the 4 in and a muffler no change in the the cab but its sounded great out side. with the stacks and no muffler, there is a much lower tone witha barly noticable in cab sound increase, with it ideling. when i driving with the winders down it sounds awsome. with the windows up i cant hear much unless im gettin on it. turbo is so lowd now its awsome
thats all great but my clutch wont hold so i cant get on it much.-mad