M3 343hp Stage 1 tuning

The BMW M3 M3 343hp produces 343 hp and 365 Nm as standard. The YASTUNING Stage 1 remap file takes it to 365 hp and 390 Nm, a gain of +22 hp and +25 Nm. Engine code 326S4. ECU: Siemens/Continental MSS52, Siemens/Continental MSS54. The file is checksum-corrected and reviewed by an experienced calibrator within factory component tolerances.