We have combined tune-files with their appropriate ECU code into one file to create what we have termed Box files. When utilizing the new Box files (calibration files with a .box extension), ProTune II version 2.4 or later must be used. Box files allow the user to load one file to their ECU, eliminating the need to manually match a tune-file with an ECU code
These vehicles have specific calibrations to meet emission regulations. Modifying or installing an unapproved calibration or module is considered tampering and is punishable by law.