Dirty rear end

Hahaha superb!!! :smiley:

They look like some kind of soft-touch velour. Mmm, velour...
 
The fact its so slabbed back, creates a low pressure area. The same reason you dont stand too close to the edge of the rail platform.

Just collects dirt.
 
Yep its definitely the diffuser, the other day in the rain mine was making a rainbow in the rear window with all the spray it kicks up.
 
i dont have a diffuser on my GT and that gets pitted in no time, probably doesnt help its a dirty diesel