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  1. 97 mustang gt tuner/ speedo question

    4.6L Tech
    Will the sct tuners correct my speedo for gears/ tires changes? I am considering buying the gears/ tuner package (Ford Racing Gears and Tuners at AmericanMuscle.com - Free Shipping!) but want to make sure that i wont get a ticket. would i need to buy a speedcal (Speed Calibrator - SpeedCal at...
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