AC - 400 - 12.0 405hp Stage 1 tuning

The Mack Econodyne AC - 400 - 12.0 405hp produces 405 hp and 1979 Nm as standard. The YASTUNING Stage 1 remap file takes it to 480 hp and 2370 Nm, a gain of +75 hp and +391 Nm. The file is checksum-corrected and reviewed by an experienced calibrator within factory component tolerances.