My 05 GT I bought used with some unknown tune already installed. Car is an auto and IMO runs like a raped ape. Your opinion unknown tune, K&N fipk, magna flow catted x pipe & magna flow cat back. I added udp, TCI 3000 stall = 8.23 at 84 mph in the 1/8 th 1.80 60' on 275/40/17 MT ET Radials...