I have a 96 GT with stock manifolds, BBK offroad H-pipe and 2 chamber flows. Right now the mufflers have been welded into the stock system but I want a true cat-back, and something that is a little louder. I have heard a couple of stangs with the MAC cat-back system, but they all had longtube headers. I was wondering how well the cat-back fits, and if there is any difference in sound compared to the flows.