Have done no research so don't spank me but is this for after changing pipes are just to fix/help with certain issues?
Since this is down in the ECU you can change more than just fuel which a Power Commander can only change, but the advantage of the PC plus an Autotune is it can make changes on the fly using a O2 sensor.
but the advantage of the PC plus an Autotune is it can make changes on the fly using a O2 sensor.I'm sure others more knowledge than I can expand.