Diagnostic Preloaded and Custom Tuning using SCT Performance's BDX Performance Tuner and Monitor, Model Number 40490. The BDX Performance Programmer provides tune files that have been dyno- and street-tested by SCT's skilled calibrators to maximize each vehicle's performance. Its modern styling, full-color display, and fully-customizable gauges assist in monitoring, data logging, and adjusting the performance of the powertrain to offer more horsepower and torque when it is most required. Choose from a variety of SCT tuning levels or import up to 20 custom tune files from one of our tens of thousands of custom tuning merchants across the world. Cables and PCs are obsolete thanks to direct-to-device updates and custom tune distribution through WiFi. The BDX may customize a number of vehicle features, including timing and rev limiter modifications as well as wheel and tire size calibration.