stock gtp's are ok. Mine was fast. Took about 3k and mine would rip apart a stock syty. I had no low end traction but it would rip from a roll. mine had 332hp to front wheels with 13lbs of boost and 91 oct.
stock is off the lot. I think they get low 14's stock. Mine had a full exhaust, intake, computer, changeable pully system, water injection, 18's all around and a custom tune. guy who did my car said his was done the same and he hit mid 12's at the track.
Cool. I think GTPs are pretty nice cars. I might actually think about buying one for daily use. How reliable are they and what sort of gas milage do they get?