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ECU from the factory is set for 128i to max speed at 130mph unless you have the "sport" option, then the factory ECU is set to allow 150mph. So, I did not do anything this time.
If you don't have a sport suspension, I would watch to see what DINAN comes up with, their ECU mods always seem to "allow the car to achieve its natural top speed."... acording to their website.
good luck
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