RGV_Z28

iTrader: (7)

I bought my car about 3 months ago from a used lot. Checked carfax and averything, and it said no audometer fraud or nothing, or anything else for that matter. However just the other day put it on cruise control at 60 and got stopped by a state trooper for going 75. Bought the Diablosport, because I figured the previous owner had gears, and just spent the afternoon changing the ratios, with none of them correcting it. Any suggestions, please tell me how to fix this. Oh, has stock rims and tires.