McLaren is road legal la..
There were very few of them though. They were initially race cars but then converted to road cars.
From wikipedia:
Many F1 GTRs, after the model was retired from racing, were converted to street use. By adding mufflers, passenger seat upholstery, adjusting the suspension for more ground clearance for public streets, and removing the air restrictors, they made quite a formidable sports car. An F1 GTR Longtail equipped like this can be described as the ultimate F1, and quite possibly the ultimate road-going supercar.
Read more at:
http://en.wikipedia.org/wiki/McLaren_F1