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where can i but a speedometer calibration tool for my car. the one off americanmuscle is not listed seperate, only in the kit. dont need the kit. just the speedcal.
i've tried.. when i did the 3.73's it didn't do anything at all. says may not work for all models.. now when i plug it up, it says err8. bout to call on that now and figure out what that is, and get more info it.. but its never worked. just asks.. performance tune yes or no, and reads codes. kinda waste of 400 bucks