E39 540i ME7 ECU Tuning Software

ESS Naturally Aspirated 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...

E39 540i ME7 Steptronic Transmission Software

Optimized steptronic transmission software, recommended for both for NA and Supercharged applications. Increases shift firmness under heavy acceleration and increases the transmissions capability to hold power during shifts. The software incorporates a...