Very interesting!
Unfortunately it is about the Golf 6 but, being on the same platform as the Golf 5, we can "steal" some ideas and products:
1. The new Bilstein Clubsport will work on our cars and I am really curios to see how much better it is.
2. the front bumper and wheel arches are really nice. I saw on some forum a guy changing the front of his Golf 5 to look like a Golf 6 R. So this front bumper can also work on our cars
3. Interesting to see that there is no rear difusor and no large undertray. Maybe these are ruled out by the competition rules.
4. The rear spoiler doesn't seem to be adjustable. It also sits very low, maybe because the competition rules does not allow for a rear wing higher than the car.
5. New suspension arms, probably longer than the OEM ones.
I would really like to see this photo in high resolution: