Through custom ECU tuning we are able to provide more usable horsepower and torque outputs by modifying BMW’s dual variable cam timing (VANOS), drive by wire tables, and fuel and ignition maps. Better part-throttle drivability is also obtained. The vehicle’s top speed governor is removed. Custom software modifications for headers or other modifications are available. Rear O2 sensors monitoring, as well as other emission related items, can be disabled upon request for race cars and/or off-road use only vehicles.