The only companys that I know of that make 3.90's are Pro50tha great one said:have any of you guys ever tried 3.90's ???? i have a friend with a 03gt 5-speed he loves them, but on the freeeway when playign at high speeds he still runs outa air

Check my sig, times are minus the jba's. DO NOT go less than 4:10's...PERIOD!Id say gears/tires would get u a 13.8-14.0's, add a mid pipe/cat back to get 13.6-13.8, 3K+ tq cnvtr to get 13.2-13.5, filter/tbody/plenum will help u run consistent low 13's. This can be done on a stock suspension from what Ive read and a bit of weight reduction wont hurt either. Hope this helps.Movn GT said:what kinda gears should i put in the 02 GT, its a auto and its convertible. And with gears,exhaust,cold air,bigger throttle body, could i have it in mid 13's ?