Originally Posted by AMDanBailer

You can definitely use this device. However, Derf makes a great point! The cost to unlock a tuner is $150 and only SCT can do it. After you get the device back and it's unlocked, there's a one time fee of $150 to buy into our free tunes for life program. Once these steps are completed, you'll be good to go and able to use the device! If the device is locked, you're probably looking at $450 said and done, compared to $379.99 to just purchase the device brand new with custom tunes already loaded for your specific Mustang.

However, if the device is already unlocked you could get into that device for $150 less. Look into the device options and see if it's locked or unlocked and we'll go from there! Whatever is easier for you, just let us know and we'll gladly help you out.

-Dan