Add Wish List Quick view Add to Cart The item has been added RaceChip RS + App - BMW X4 (F26) (2013 - 2018) 28i (245 HP/ 180 kW) Torque Increase (NM):75Economy Gain (MPG):20Power Gain (PS):40RaceChip RS Tuning Box - Bluetooth Version with App ControlThe bestseller of the RaceChip tuning boxes. Completely newly developed optimisation software with engine-specific tuning,... MSRP: £308.00 Add to Cart The item has been added Compare