IE's record breaking 3.0T ECU Tunes are fully realized performance calibrations that deliver unmatched power figures. Without a matching TCU tune, the transmission will short shift the powerband at 6300RPM vs the tune's peak power at 7200RPM -leaving power on the table. Furthermore, the TCU upgrade modifies shift speed, torque limit maps, line pressure, and launch control functions, to fully match your ECU calibration. As a result, horsepower and torque levels are raised and acceleration is greatly improved to create a complete ECU & TCU performance package.