M3 321hp Stage 1 tuning

The BMW M3 M3 321hp produces 321 hp and 350 Nm as standard. The YASTUNING Stage 1 remap file takes it to 350 hp and 380 Nm, a gain of +29 hp and +30 Nm. Engine code 326S1. ECU: Siemens/Continental MS41, Siemens/Continental MSS50. The file is checksum-corrected and reviewed by an experienced calibrator within factory component tolerances.