I know a lot of you guys have sd headers or ssacs, they come with the 3in downpipe, I was wondering I finally got the 97 gtp running and I was wondering should I just run 3 inch pipe all the way back to the muffler? Or downsize to 2.5 or something close to that sound..and would three inch sound bad? Opinions would be appriciated...what setup are you guys running and how do you like it? Tia