Hello I would let my M57 engine in the X3 increase the Agr rate so the less exhaust gas will be burned along with it. I recently cleaned the intake bridge and this looked quite good so it should fit quite well just it was just a bit worn out. Now the question is if there could be disadvantages there? I read that the combustion temperature then rises strongly from 400° to 600-700°. Maybe here can be explained in summary whether this any risks with itself Thank you.