They all have rev limiters in, just about every car with an ECU has one, it's common sense.
These aren't carbied V8's that let you spin em till they do bearings, or just 'splode, etc.
Just coz the guage says 9000 RPM doesn't mean you can actually hit it.
You can get Nismo 320KPH Speedos too...
I can't remember the factory ECU strategy but I'm pretty sure it's an ignition cut.
They make a distinctive noise when they bounce off it too.
I tell a lie, you probably could hit 9000 RPM if you were revving high in 3rd gear, and on the gear change managed to grab 2nd instead 4th.
Pretty sure a Volvo did it in Targa a few years back, went to 10,000 RPM, then popped!
Edit: The easiest way to find it (your limit) is do a burnout in 2nd.
You should be able to hold it there no worries for a while.
Just don't go free revving it to find out (can't remember exactly why but) it's bad.
If i remember rightly stock R32 is about 7200RPM (gauge reads 8500-9000 and redline starts at 6500-7000).