E39 M5 Remote ECU Tune

$750.00 $600.00


The RK Autowerks Stage 1 E39 tune yields an additional ~25WHP and ~30WTQ safely for the moderate consumer looking to get more out of his or her M5. The tune is utilized via an OBD2 system so the user never has downtime with his or her vehicle. Every tune comes with an OBD cable that is shipped to the user as well as the necessary software.

This software is calibrated to the maximum capacity of the OEM hardware over the result of several 100’s of dyno runs. The exact parameters allow us to safely increase the performance of a customers vehicle resulting in increased drive ability, fuel economy, and increased longevity of select components.


Available options:
-Removed cat check option for off-road use.
-Removed cold start cat heat up cycle.
-Alpha-N map for maf sensor removal.
-Removed top speed limiter.
-Improved throttle response.

Additional information

Weight 5 lbs
Dimensions 5 × 5 × 5 in


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