The RK Autowerks Stage 1 S85 tune yields an additional ~35WHP and ~30WTQ safely for the moderate consumer looking to get more out of his or her M5/M6. Our in house tuning ensures your vehicle drives like OEM and we retain all safety features from factory. This allows the end user to safely increase the performance of his or her M5/M6
This software is calibrated to the maximum capacity of the OEM hardware. This software should not be used with additional piggybacks of any kind as it is already fully tuned through ECU software directly.
- 535+ HP / 400 FT-LBS Of Torque
- Improved Throttle Response
- Smooth Power Delivery
- Stock-Like Driveability
- OBD II Emissions Compliant
- Safe, Proven & Tested Results
-Removed cat check option for off-road use
-Removed cold start cat heat up cycle
-Removed top speed limited.