They do that in Germany. Higher end cars come with a governor that caps the speed at 250 km/h. (That's around 155 mph, for the unenlightened.)

That's still below the legal speed limit on some German roads. But it's above the highest recommended speed of 130 km/h (~ 80 mph).

The governor is merely a gentlemen's agreement between the big car manufacturers, and any garage will take it out no questions asked.