 Guinness (which had listed speeds by British cars with modified limiters as production car records in the 1990s) upheld the appeal and initiated a review of their production car definition, the outcome was that turning off the limiter was not a fundamental modification and the Bugatti record was reinstated.Guinness were also reported in some sources as saying that at least 50 identical vehicles were needed to be made to constitute a production car but several models which were built less than 15 times got certified for production car records.In February 2014, "Road & Track" wrote that Guinness required 30 identical vehicles.