The ESS E-Flash OBD2 programming system allows the end user to upload the ECU tuning software directly to the car from any PC running Windows 7 or newer. The system also includes full diagnostic and code clearing capability. Any future ESS software updates can be received by email and loaded directly to the car. The stock ECU software will be saved and can easily be restored in the future.ESS Normal Aspiration optimized ECU software is a result of 100's of dyno runs and exact calibration of all parameters to allow maximum performance gains with improved driveability/fuel consumption and stock engine longevity. Removed top speed governor is included, and you have the option of stock RPM limit or up to 7600RPM, default setting from ESS is 7200 unless otherwise instructed.Power is increased by 10-15 WHP when programmed for premium fuel (91US/96Euro or above). Throttle response programming is improved over stock. Vehicles SupportedBMW E39 M5
