Add Wish List Quick view Add to Cart The item has been added RaceChip RS + App - BMW 4 Series (F32-33, F36) (2014 - 2020) 420d (200 HP/ 147 kW) Torque Increase (NM):67Economy Gain (MPG):20Power Gain (PS):30RaceChip 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