4120 4.5 L 121hp Stage 1 tuning

The Steyr Profi 4120 4.5 L 121hp produces 121 hp and 549 Nm as standard. The YASTUNING Stage 1 remap file takes it to 150 hp and 640 Nm, a gain of +29 hp and +91 Nm. The file is checksum-corrected and reviewed by an experienced calibrator within factory component tolerances.