The Tokyo Auto Salon can be thought of as the Japanese version of the SEMA show which takes place in Las Vegas each year. There, among other vehicles, was a custom RC F Coupe. You can see many carbon fibre parts on the RC F -- the front diffuser, the hood, the roof. And I believe that there is a widebody kit on there as well.
You can check out a gallery that covers a number of other stand out custom model from Tokyo through the link below.
Gallery: Best Supercars and Exotics from Tokyo's Version of SEMA » AutoGuide.com News