4.2 V8 344hp Stage 1 tuning

The Audi S4 4.2 V8 344hp produces 344 hp and 410 Nm as standard. The YASTUNING Stage 1 remap file takes it to 364 hp and 440 Nm, a gain of +20 hp and +30 Nm. Engine code BBK. ECU: Bosch ME7.1.1, Bosch MED9.1. The file is checksum-corrected and reviewed by an experienced calibrator within factory component tolerances.