There are also a couple of modified street legal 'F1' cars in the world. One's in Japan and it's got a 2 litre F3 engine and one's in the UK but I don't know the engine for it. They totally comply with local laws, so the UK one's got mudflaps, indicators etc. At Monaco they used to drive F3 cars from the track to the garages (not sure about the F1 cars though). Martin Brundle actually fried the engine of an F3 car there because he got stuck in traffic.