The SCT is simply a device to transfer tunes to the car, and the 4 is just a newer and nicer version of the 3 with more features, but their core function is still the same.I have a question about the SCT bama tuners. Do the SC3 and SC4 come preloaded with the same tunes? Is it dangerous to buy a used one?
These tuners, depending on who you buy them from new, can come preloaded with any tune. If you buy from Bama it will have a bama tune, from MPT it will have an MPT tune... When buying used, you need to make sure the tuning device has been "unmarried" from the previous owners vehicle, otherwise you cannot use it. If the tuner is unmarried, you can receive emailed tunes from any of the big companies and just load them up on the device yourself, hope this helps.