4.2 Biturbo 450hp Stage 1 tuning

The Audi RS6 4.2 Biturbo 450hp produces 450 hp and 560 Nm as standard. The YASTUNING Stage 1 remap file takes it to 520 hp and 725 Nm, a gain of +70 hp and +165 Nm. Engine code BCY. ECU: Bosch ME7. The file is checksum-corrected and reviewed by an experienced calibrator within factory component tolerances.