We now offer EWS deletes for the MSS54 and MSS54HP ECUs found in the E46 M3 and CSL. Commonplace on race cars, an EWS delete allows for "hot swapping" ECUs. Customers can have multiple ECUs with different configurations and switch between the ECUs at any time. Please note that you must purchase an EWS delete for EACH ECU that requires modification. You do need to ship your ECU(s) to us for the EWS delete if you have a method of reading/writing a full binary file to the ECU.
Disclaimer - Flash tuning is separate from coding and diagnostics. It will not solve underlying mechanical or electronic issues, and in some cases, it can make problems worse. We highly recommend you consider tuning to be a final ECU calibration and the very last step when optimizing your vehicle. Recommended for off-road use only!