Well I've done 250 km/h on the speedo with stock exhaust. It was a bit windy though. I think it can do 260 km/h on the speedo.
A friend of mine drove 239 REAL km/h with a slightly tuned VTR it was measured by the local police on a nearby airstrip. A tuned SP1/RC51 drove 256 km/h while the speedo showed 291 km/h
