I know, all sources say the same thing: Ford intended to use the FIA regulations for evolution cars and instead of converting some of the standard Sierra RS Cosworth they built 500 extra cars intended to be converted later. Usually meant to be in black only they ended up separating 500 cars including about 100 in white and blue. The cars were stored for some time and then sent to Tickford to have the YBB taken out and replaced by a YBD prepared by Cosworth, replace the front bumper, add the rear spoilers/lips and RS500 stickers.

AND all sources say: Ford just used RHD cars. And no one has ever seen a REAL RS500 road car as left hand drive.

Prize question: Why were the cars in the german DTM (racing 1987, 1988 and 1989 as RS500) driven by Ludwig, Hahne, Winkelhock, Reuter etc. and in the 1987 WTCC driven by Ludwig and Niedzwiedz all LHD cars? I can't tell you the VIN but all cars do have the RS500 front bumper and the rear spoiler(s). The Nürburging 24h winning car of 1987 (Ludwig, Niedzwiedz, Soper) als is a LHD RS500...