I had a Gibson downpipe back with a muffler installed the other day and thought I would pass along my thoughts on the system. So far I am very happy with the way it sounds and performs. It really lets the turbo whine and I am not getting any drone. It is not to loud, but has a good diesel sound to it. I did the four inch back with a five inch chrome tip. The nice thing is no codes at all. The throttle response is a little quicker and I think my mileage has actually gotten better, but I won't know for sure until after this tank.

i have the same on my 02 and i love it