I just bought another 95 GT that came with Mac shortys, h-pipe, and is dumped out of high flow cats . Its loud as crap and annoying. But is good for scaring joggers, distracting kids from school, and making every dog in town bark. I ordered a Mac catback system a few weeks ago when i bought the car, but its lost in shipping....
I really like MACs on 5.0 and 4.6 cars

. They sound mean and healthy. Im also more fond of bbk longtube headers.
I used to run all dynomax since I could get them cheap/free. Im not big on their sound though.