Running duct tubes all the way back to the wheels is a tight mess. Without moving anything, my shop was able to work around most lines and even had some intersecting through the tubes. You can actually see the compressor and a/c lines inside of the ducts. Yes they are there, but don't significantly detract from air flow. The job is very involved and probably not worth the hassle as the whole front of the car has to be dismantled - i.e. $$$. I would take some pics for you, but I just dropped the car off this afternoon for measurements on a new Brembo GTR Braking system. The blocked of ducts do look kinda bad, but if it's brake cooling for cheap your seeking, maybe bring the air from underneath like the vents on the newere 911 racers.