Had them on my A4 and the exhaust debris they left on my cars back-end really sucked big time!
Also, I'd take the exhaust clamps on those tips and go a complete 180 degrees, so you don't see them and have less chance of contacting them if you are underneath.
Gotta say, I'm not a fan of anything that's been done to that GTI. The Taxi badging on the front, the awful off-colour eyelids, the ricer exhausts, the rear lamps, the chrome wheels....
The OEM-style Candy Whites are the best...
(that's Auf Wiederschen!, scuderiavw, and GTI2007). Those cars look hawt.
The ricer-GTI that GTI2007 posted... errr... not so much.