is there any performance computer chips that calibrate speedometers to fix the speedo after a gear change?
If so, would this be a worthwhile mod for a gt with an offroad x pipe (no cats) flowmasters and 3.73's or for the money would it be best to just by the speedcal for now.
If so, would this be a worthwhile mod for a gt with an offroad x pipe (no cats) flowmasters and 3.73's or for the money would it be best to just by the speedcal for now.