You can also by pass the limiter by diconnecting your speedo cable, obviousily use a sat nav to know what speed you are travelling.
I accidentally figured this out one day, I had my cable out when I had my gearbox out replacing the clutch, when putting it back together I didnt put my speedo cable back on as it was awkward to get through the firewall and it was dark, late and I was tired so I threw the cable in the boot, on my way to work the next day I was going rather fast down the motorway...waiting on the limiter to kick at its usual 112mph.....no limiter......I look at the sat nav and it read 125mph....well I near shit.