I raced two GT 500's with my Jeep. Both were on eigth mile. I have cold air and programmer on Jeep. I beat first GT by about a foot and he was coming on hard. Elevation of 3500 feet, my time was 8.7 and his 8.6 . I got him on reaction and 60 foot pretty good. By comparison I have run a best of 8,6 on hot day with stock 02 Z06. Best time of 7.5 with stock 08 Z06. Other race was at 1700 feet elevation , beat GT again by about a foot. My time was 8.2 and his was similar. He had pulley,programmer,intake and drag radials. He had some shifting problems. Haven't run my GT 500 yet but I will when the tracks open around here. Should be interesting.