2000 - 2006 BMW E46 M3 - Performance DME Tuning - S54B32 - MSS54 MSS54HPBMW S54B30 with MSS54 and MSS54HP Performance ECU tuning software for BMW E46 M3. E46 M3 Performance ECU Tuning Features: Improved throttle response, can be requested to leave stock pedal sensitivity. Improved wide open throttle and part throttle horsepower and torque Gains 10 25WHP 10 25WTQ, depending on vehicle condition and wear. Rev limiter raised 300rpm, can be set to another requested spec. Speed Limiter Disabled Optional Sport Button Memory