Originally posted by g-50Cab
Mine are drilled - from the factory. I also have an under the A-arm scoop that picks up air and shoves it through the hub, and into the rotor itself escaping through the holes and the vanes in the rotor.
Interesting. My mistake. That's what I get for listening to somebody else and not owning a Porsche myself. Dammit. LOL
I have used one of those scoops (Porsche air deflector) you're talking about. They didn't help cool my brakes at all. Others have said the same, some have not (must have something to do with Porsche design and the holes most likely). Now each side has two 3-inch hoses doing a good job.