Most tuners will do minor updates for free of charge if they have already tuned your car. Or most all handheld tuners have the option to change the ratio for the speedometer.
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2012 2SS/RS 6speed, Howards asa cam on 113lsa Stainless works LT's, NPP exhaust, Z28 Cai, 3.91 gears. Tuned by Blue Thunder 2 racing Lubbock Texas.
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