When I look back it looks like I wasn't too clear on where the air from the duct goes. It directs the air on the front edge of the rotor, as well as the inner side of the rotor on the front half. Make sense? It's like the air is directed to the corner of the rotor. I hope this clears thing up a bit, it's a little hard to put into words (at least for me). Sean H '92 535i