One of the most renowned Group B cars was the Porsche 959, at the time the wildest, fastest, most technological advanced Porsche ever. In the intervening years "run of the mill" 911s have eclipsed the performance of 959, but at the time it was king of the hill. None of the less than 250 examples were ever made US street legal from the factory although some were privately imported to the US anyway, including two by Microsoft founders Bill Gates and Paul Allen. They weren't allowed on public streets until 1999 when they and other rare cars were given an exemption to drive a limited number of annual miles. Since then Gates is reported to take regular late night jaunts in his 959, although those days appear to be numbered. The state of Washington is looking for ways to reduce pollution and Governor Chris Gregoire is considering trying to get those rare car exemptions revoked. If that happens Gates may only ever be able to drive his 959 on race tracks from now on.
[Source: Australian IT News]