Hi-Flow Cats

BBK has a nice high flow piece that will mate up to stock manifolds. Expect to pay around $360-400 for it though. If you want a real race car sound, go with Dr Gas, and get the cats welded in. Thats the only problem with a Dr Gas pipe IMO it comes in pieces and you have to weld it or have someone else do it for ya.
 
Thanks for the info. I think that I'm more interested in the sound than the performance. I used to have a 94 GT and ran 2.5 inch flows with an off road h-pipe and loved the sound of it. So are you saying that the Dr. Gas with flows will give me the closest sound to my old 94 GT? Also, does a 96 GT come with 2.25 or 2.5 exhaust? Thanks again.