EFI Live has the only custom operating system for Dodge Cummins engines that allows the user to select the desired performance level that you choose anytime that you want. An option CSP5 switch can be installed that allows the user to select from 5 different tuning options on the fly. Stock, Economy, Tow,Street & Race. With a turn of a knob, your truck can change from Stock to ready to race. Starlite Diesel has the ONLY device on the market today that allows EFI Live users to select there desired tune by using your Android powered device. Please visit our links below for the StarLogs Bluetooth Android device for more information. Edge monitor owners listen up!. Your Edge monitor has the ability to select between tunes as well. Let us know before ordering if you have an Edge product and you want the ability to select the tuning using your Edge products.