Does this pertain to 2018 EcoBoost upgraded to Active Exhaust also? I am Cobb tuned and I was thinking about retrofitting to the Active Exhaust since I have the plug that makes it easy. But I wont be doing that if I have to remove my tune to do so.
No idea. I don't know the technical details of how Cobb detects the AE cars. Though I've contemplated using FORScan to turn off the AE flag, and see if the tune will install, and then turn it back on. I expect that has a good chance of working, but no idea if it would cause any problems. If it does cause a problem, I have no idea what possible engine damage could be done, so I've been hesitant to try.
They told me something similar, but I'm not sure I believe that completely. Part of the reason the exhaust is 'active' is so that the valves open/close dynamically based on RPM. On the factory tune, I wouldn't expect a change in performance based on the exhaust mode chosen. Also, if you can just enable the active exhaust function with only a FORScan flag (as shown by folks who have done a retrofit,) then I'm not convinced that there are different ROMs.
That is a valid point! From everything I've read on the retrofit, it is fully functional and there seems to be no difference in performance between a 2018 EcoBoost AE retrofit vs a 2019 EcoBoost AE factory. This is assuming of course that the retrofitted 2018 went with a Y-Pipe or equivalent like the 2019.