my mom has a 99 grand am GT ram air 4 door.. i never took it to the track, but i have a g-tech pro which i used on it a lot.. i think the best time i saw on it was a 7.0sec 0-60 with the traction control off on a dry road.. And last year at the track i saw GT's running 15.4's all day.. And if you are wondering about the top speed, my moms 4 door GT maxes out at 122mph and will not go any faster.. its drag limited.. i used a 5 mile stretch of road here in rochester which is very straight and flat.. And just so you know, i'm not some young punk that beats on his moms car... I'm 23 yrs old, i have a 99 SVT Cobra, and a 04 civic DX both payed for by myself..