D.A.S. or Dynamic Air Scoops from aFe, are a simple way to increase air velocity and air flow through your 3-series E90/91/92/93. Dynamic air scoops are constructed out of lightweight black powdercoated aluminum and simply install behind the kidney bean grille. Increased air velocity and flow improves performance and throttle response. These scoops are a perfect addition to a cold air intake installation.