Specialy 525i edition for US?

[Arxon]

Hi everybody,
recently I upgrated my 520 to 525 (completly upgrade not only the engine). I live in South Europe and the 525 was imported from US. I know that the rpm's limit is 6.500 rpm, but when I try to check the highest speed with the 5th gear, my car ends to the 210km/h and the routes are 6000rpm, then I feel that the car is being "blocked" for some seconds, then trying again to pass this limit and so goes again. Is there a kind of limit for the US edition? From what I know the 525 ends to the 230km/h, also my 520 didn't give me the feeling of "blocking" at its end at 210km/h.
Thank you George.

[bimmerd00d]

128 or 138mph is the limit on US cars.