[olddog]

MassFlow is no longer using the EEC4 from the 89-93 Mustang GT - which was a A9L code. They are having their own ECU built by the same company that supplies Ford. From what I read it comes with the software to change anything you want to change. It may even have data logging. It looks like a great system, but I have not experience with it.

There claims in the past that it was plug and play system was kinda true if you put it on something close to stock, but frankly I considered their claim to be BS. However the concept and looks was great. It is definitely worth looking at.