The rev limiter varies based on what gear you are in. Put the car in neutral and floor it, the engine will sit at 4300 rpm (or was it 4100?)
Now, try flooring it in each gear and see where it limits, you will see what I mean.

I believe tuners (that is, the people who do performance tunes) can fill you in better than I can about what the limits are. The MSS, Rudy Compart and Rob at Needswings would be good people to ask.