Add Wish List Quick view Add to Cart The item has been added RaceChip RS + App - Audi RS4 (B9) (from 2017) RS4 2.9T (450 HP/ 331 kW) Torque Increase (NM):94Economy Gain (MPG):20Power Gain (PS):50RaceChip RS Tuning Box - Bluetooth Version with App ControlThe bestseller of the RaceChip tuning boxes. Completely newly developed optimisation software with engine-specific tuning,... MSRP: £458.00 Add to Cart The item has been added Compare