Marco, if I may, I'm curious about your intake/hood setup.
The stock induction system on the S65 was designed with the hood inlet/vent as one of the three main air inlets as described in the following BMW diagram, the other two being the inlet behind the double kidney-grilles and the inlet in the bumper.
Even though your hood is weight optimized being carbon fiber (based on the video), I noticed there is no hood vent/inlet a la the E9X M3 hood so with your hood closed, the air inlet guide on your intake that sits where the hood inlet would be is effectively blocked from receiving air.
Was this deliberate? Or was there a discussion with the guys who worked on the project? Obviously a Dinan 4.6L is far from stock, but I couldn't help but notice that your air intake system follows the shape of OEM S65 intake but the hood doesn't have the inlet.