Ford Racing's calibration package for the 2013–2014 Focus ST includes a ProCal tuning tool, cold spark plug set and a cold air intake to increase torque and engine response. With the combined hardware and calibration, Ford reports significant torque gains at lower RPMs on premium fuel and a broader torque increase up to midrange, while revised sound symposer settings create a more natural engine note. Intended for use with 91–93 octane fuel.
Ford Racing 2013-2014 Focus ST Calibration with Spark Plugs