Don't really see what you mean, looks normal to me. They have some damage though, they crashed on the big jump track someone here made. They had to pit to fix the mechanical damage I guess, but tyres always get changed as well.
Anyway, more pics as promised. As you can see the tyres just go through the panels and the panels are pretty much floating there. Maybe better pit stops in GT6?
Bit silly though how they showed everything in the old GT trailers, but now it didn't work out with a few cars and they just don't allow us to see it on all the cars. Except with the glitch through walls/cars thing in Photo Mode we can still see it.

Only on other cars though, not your own. If you're in the pitlane yourself you can't move the camera.