The lower intakes labeled above go to the front brakes, they are large enough that my friend and I could stick our hands in from either side and hold hands lol.
The stock air boxes take some air in from either side of the rads at the height of the kidneys.
I talked to the Pure Turbo's EU rep who has a 800whp M3 and does 1km/1mile racing and top speed runs and he told us that the stock airboxes and filters flow the best. The only modification he made was to make an opening in the airbox so that it is not choked.
The Eventuri setup actually lost him power for what its worth. They do sell some CF scoops that might help bring more cool air to the stock boxes
Very pretty setup non the less!