As I understand it it serves two primary purposes: at high speeds the swoops can create a downward pressure-based force vector on the network box which helps with road surface adhesion when cornering and 2) it reduces the Network Box's drag coefficient which improves mileage.
Your welcome......
Thank you!
My guess is that the shape allows an unperturbed flow of audio pressure waves over the network box, so that the box does not adulterate differentially the flow of different frequencies.