Through custom ECU tuning we are able to provide more usable horsepower and torque outputs by modifying BMW’s cam timing (VANOS), fuel maps, and ignition maps. The rev limiter can be set between 7000-7400 rpms depending on cam choice. Optional custom software for larger airflow meters, headers, larger cam shafts and bigger injectors is available. Rear O2 sensor and other emissions monitoring can be disabled upon request for race cars and/or off-road use only vehicles.