670B - 8.4 - 355hp Stage 1 tuning

The Challenger 6xx 670B - 8.4 - 355hp produces 355 hp and 1 Nm as standard. The YASTUNING Stage 1 remap file takes it to 446 hp and 1 Nm, a gain of +91 hp. The file is checksum-corrected and reviewed by an experienced calibrator within factory component tolerances.