![]() New tunes can be emailed to you instead of having to send back the entire handheld tuner for reprogramming. which can be great for racers at the track and customer's with wide-band O2 sensors. You will have the ability to edit certain parameters directly on the unit such as your air/fuel ratio, your final spark value, gear ratio, etc. They cannot be unlocked without first returning the original car back to the stock tune. The unit "VIN locks" to your car, so it can only be used in the first vehicle it was used in. ![]() The first time you use them they will download your car's stock tune into a 4th slot for safe keeping, so you can return your car back to stock at any time. They hook up to your car's ODBII port located under the dash on the driver's side. The SF4 Strategy Tuner and the SCT LiveWire are handheld units with LCD displays that are used to flash, or overwrite, the existing tune on your car's computer.
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