Add Wish List Quick view Add to Cart The item has been added RaceChip RS + App - BMW Z4 (E89) (2009 - 2018) 35i (306 HP/ 225 kW) Torque Increase (NM):89Economy Gain (MPG):20Power Gain (PS):61RaceChip 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