2.5i 170hp Stage 1 tuning

The BMW Z1 2.5i 170hp produces 170 hp and 222 Nm as standard. The YASTUNING Stage 1 remap file takes it to 185 hp and 240 Nm, a gain of +15 hp and +18 Nm. Engine code 256K1. ECU: Siemens/Continental MS42. The file is checksum-corrected and reviewed by an experienced calibrator within factory component tolerances.