The race part is really awesome as aspect. The build up for this arc should be Juri messed up again with one of her clients who is Yakuza and they have to race or something and that would made much more sense, but whatever....
Shun, because obviously there were some deus ex corpse parts that got stuck on the yakuza's car from years of dragging people to death, thus making it weigh more and slowing it down.