i honestly never have anyone try to dragrace me EVER seriously it only ever happened once with 5 guys in a non turbo supra.
...faggots.
anyway, that said. you're a new user, judging by the pic in your sig with the parker head lights AND foglights on, i'm guessing you have only just bought your ceffy, (don't worry, we're all fascinated by our foglights at some stage)
if you've only just bought your cefiro. well done! but, if commodores are coming after you, let them. the speed limiter is kinda there for a real reason if you think about it dude. it's not hurting anyone. leave it there.
that's what i say.