This is something I have always wanted to figure out, and now I think I am pretty close to connecting the dots, but a few blanks still exist. I think we all know that there is fan assisted down force increasing feature built into the F1. The fans are located at the front of the engine bay, and somehow suck air from bottom of the car to remove the boundary layer and increase the efficiency of the diffuser. I have attached a picture showing the fans in the front upper corner of the engine bay, and one showing the underside where the air is taken from. My question is how does it get from point A to point B. I assume that it travels through a passage that is built into the chassis which the ECU rests against, since this device apparently also doubles as a method of cooling the electronics. I have attached a third picture with the rear removed and what appear to be an opening in the lower rear of the engine bay. If that is the passage, how does air get from the diffuser to there, a hose like the break cooling lines? Or is there something built into the inside of the diffuser that connects the two? And what is the route that the passage takes through the chassis?