You really wouldn't be getting any benefits from have carbon fiber piping at all. The weight drop is negligible, since aluminium piping is not that much heavier than carbon fiber. The heat transfer is a bit better than aluminium, but again it's negligible. If looks are what you're after, I would recommend getting aluminium piping and having it powder coated to a carbon fiber or other nice finish. It will be much cheaper and have the same effect.