A new item for the 2007-08 GT3 & GT3 RS models. This is the same set which comes on the 2010 GT3, and we just installed them on a 2007 GT3. They are a direct fit, some minor triming of the brake shield is required.
They pull air from the underside of the car, and channel it to the rear brake system. This results in lower brake temperatures leading to greater braking performance under high loads, as well as reduced wear.
Please contact me if you have any questions.