nojo15C63 and IS F
RM's aren't allowed. Also no permant upgrades allowed and we have to use stock suspension and transmission settings.The IS-F can even be Race Modified if you didn't already know.
Best performing...define fast....
If that's the case, then the sedan you pick will come down to the track. If the track has lots of straight sections and not very many tight, technical bits, then the C63 will blow the M5 out of the water. (The C63 can be turbocharged and will have a significant power advantage, the M5 can't.) However, at a tight course like London or Tsukuba, the M5 should win because of how much better it handles. Test them both out and see which you prefer.RM's aren't allowed. Also no permant upgrades allowed and we have to use stock suspension and transmission settings.