Porsche Carrera GT in Fayence Yellow.
I think so or hope so according to the license plate. They had a 356 by it in that color.
On that note, here's the 400R in it's rarest color option, Midnight Purple.
Rarer than 1/1?
Lightning Yellow was only painted on the very first 400R, which is still owned by Nismo today.
http://gtr-registry.com/400r.php