SCT is a top manufacturer of flash devices and handheld tuners. We've been using them for years with great success. They have the ability to not only flash the car with their base files but they can also store multiple custom tunes. The SCT devices for the 2018 mustang also have the ability to read/clear DTC trouble codes, wifi updates, crank relearns for after installing a new clutch, datalogging and much more. Their devices are very simple to use and are backed by SCT's excellent customer support. If you have any questions regarding any of SCT's products please feel free to give your Lethal Performance sales associate today.