C63 507 — Stage 2 ECU Tune

The M157 is already a strong platform from the factory, but the 507 Edition leaves plenty of room for expansion when the right hardware is in place. This 2014 C63 came to us with a full Weistec Stage 2 supercharger kit and long-tube headers already fitted, and the calibration work centred on extracting reliable power for closed-circuit use.

The file adjusts fuel delivery, ignition advance, and supercharger control to suit the increased airflow and boost pressure. The workshop recorded 489 kW at the wheels with 1030.4 Nm of torque, both well beyond the factory output and comfortably in the range you'd expect from this hardware combination on 98 RON. Thermal management and part-throttle drivability were prioritised throughout the rev range.

Stage 2 supercharger builds tend to expose weak points in the driveline, so it's worth checking transmission, diff, and axle condition before pushing hard. The file is conservative enough to live on the street but really comes alive on track.