Notice the picture I took below at the factory a couple of months ago. The car on the right is a V10 test car (verified by the paperwork on the front seat). It has the wider side blades and wider lower sills. It does not have the V10 version bumpers or the oval tail pipes - most likely because the pipes are attached to the bumper...
It makes no sense to have a test car in the US without at least the modified side blades.
John Stahmann
AudiWorld Contributing Editor/Moderator
2008 RS4 - Imola Yellow/Titanium

Previous Audis:
1975 Audi 100 ls
1998.5 A4 1.8T quattro - Brilliant Yellow
2000 Neiman Marcus TT
2000 TT 180 quattro - Silver
1999 A6 2.8 quattro - White (Stolen)
2000 S4 - Imola Yellow
2003 A4 1.8TQ Avant - Atlas Grey
2005.5 A4 2.0T quattro Sedan DTM - Light Silver/Black
Bonneville 130 Club member 2001
Bonneville 150 Club member 2007