Best Exhaust setup
 

What is the absolute best meaning loudest, deepest, MEANEST exhaust possible for a 97 GT? This includes intake, headers, pipes, and mufflers.

Well.... If you just want it to be as loud as possible.... Don't run anything... Bolt some tubes to your exhaust ports, and send them up through holes in the roof :-D , that would be a nice sound!!! ... As far as something legal.. I don't know, i would say a good set of headers (short or long) from FRPP/Steeda/MAC/BBK, nice H/X pipe.... so many choices, only one stang.... too bad exhaust wasn't easier to deal with, I would change it weekly...