(RRP £399) NOW £279 inc | Do you want to gain more power, torque and better MPG for your BMW 4 Series Convertible? Then look no further. Our BMW performance remapping via the OBD port will dramatically improve your car's performance and improve your MPG! Performance ECU Remap Improve Power | Improve MPG | Recommended Maximum Power Gain 59HP | Recommended Torque Gains 120nm | MPG Gains Estimated 10-20% Subject to Driving Style - Contact Us Today Mob: 07889 266194 MPG Tuning | Staffordshire | Midlands