430i 258hp Stage 1 tuning

The BMW 4 serie 430i 258hp produces 258 hp and 400 Nm as standard. The YASTUNING Stage 1 remap file takes it to 287 hp and 450 Nm, a gain of +29 hp and +50 Nm. Engine code B48B20B. ECU: Bosch MG1CS003, Bosch MG1CS201. The file is checksum-corrected and reviewed by an experienced calibrator within factory component tolerances.