420i (184 HP/ 135 kW/ 1997 ccm)

We developed RaceChip XLR5 to increase responsiveness on the road. Our innovative throttle tuning system lets tune your engines reactions to your taste choose from 7 separate stages. You will love your cars improved dynamics we promise.Your engines...

Torque Increase (NM):66Economy Gain (MPG):20Power Gain (PS):43RaceChip RS Tuning Box - Non Bluetooth VersionThe bestseller of the RaceChip tuning boxes. Completely newly developed optimisation software with engine-specific tuning, high-quality hardware...