M3 CSL 360hp Stage 1 tuning

The BMW M3 M3 CSL 360hp produces 360 hp and 370 Nm as standard. The YASTUNING Stage 1 remap file takes it to 380 hp and 390 Nm, a gain of +20 hp and +20 Nm. Engine code 326S4. ECU: Siemens/Continental MSS54. The file is checksum-corrected and reviewed by an experienced calibrator within factory component tolerances.