Is the Mazda furai street legal?

Yes, the Furai is street legal. It was made by Mazda to fill in the the gap between super cars and track cars, being barely on the edge being a track car but still a super car. Although it is made street legal, the Furai can be used as a race car as well, with nearly the power of a race car under its hood. It is a match for even the fastest street legal cars like Lamborghinis or Bugattis.