Same here with the speedo...I have 3.55s and at 30 on the speedo-I am going 35 on a GPS and at 60 on the speedo-I am going 70 on the GPS. It is very inaccurate, but at least consistent. I did order the 23 tooth gear b/c of the 17" wheels, but did somebody say that it will still be inaccurate?
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93SVTstang-93 Cobra: 80mm MAF, K&N, 8mm plug wires, shorty headers, off road h-pipe, Borla Cat-back, centerforce clutch, hurst shifter, 3:55s
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