Mercedes C63S Pre-Facelift Retune – 421 RWKW Unlocked | Custom Dyno Calibration
- Jan 9, 2023
- 1 min read
Updated: Feb 25
Adam brought in his Mercedes C63S pre-facelift because it wasn’t hitting the power it was capable of.
Previous flash tune: 374 RWKW
After REVHIGH custom dyno calibration: 421 RWKW 🚀
The results were impressive:
Big power gains
Stronger mid-range pull
Proper, smooth power delivery
Watch the video below 👇 to see the full C63S retune in action!
Unlike generic flash tunes, custom dyno tuning unlocks the full potential of your engine. Each calibration is tailored to the vehicle, ensuring safe, reliable, and consistent performance gains.



Whether you want peak power, improved throttle response, or better overall driveability, a professional REVHIGH dyno tune makes all the difference.

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