Built in secrecy by TWR at the request of a Japanese Businessman from Tokyo.
Unlike the standard car these ones have the 7.4L V12 derived from the XJR-12 Group C Car sat in the back. The cars were built solely for racing and so the engine only has an expected lifetime of 6000km and has had no modifications done to make it more tame on the street.
Unfortunately all documentation for the cars was lost around 2002 when TWR went bankrupt but it is believed that 2 Blue Cars, 2 Green Cars and a White one were delivered to Tokyo.