It locks to a single ECU at a time . You can return locked ECU to stock to unlock it . then you can use it to lock to another ECU & program it . This can be done three times before you must contact SCT and buy more " changes " .
my buddy just bought a 07 mustang gt and he purchased a sct and really likes it. he said he gets free email tunes based on his set up. do you have something like this with the neon srt-4? and if so can you add 2 step into your tunes?
help! i apparently need to replace my ecu...damaged in accident..found one im looking to purchase and it comes with antennae...need to find someone to reprogram the damn thing ...no dealership will touch it