RS5 4.2 V8 450hp Stage 1 tuning

The Audi A5 RS5 4.2 V8 450hp produces 450 hp and 430 Nm as standard. The YASTUNING Stage 1 remap file takes it to 470 hp and 455 Nm, a gain of +20 hp and +25 Nm. Engine code CFSA. ECU: Bosch MED17.1.1. The file is checksum-corrected and reviewed by an experienced calibrator within factory component tolerances.