I think the takeaway here is tread very cautiously when it comes to mods. In addition and as I previously stated sometime ago, even of you reverse mods to the ECU etc. BMW may very well still be able to tell if the vehicle was operating outside of its factory set parameters. As Remo in the movie Casino wisely said...why take a chance?
https://getyarn.io/yarn-clip/d6dc804...tllELA9FH.copy