Guichet is also known as the first owner of 1963 Ferrari 250 GTO chassis number 5111GT, one of only 36 produced. He successfully raced this car, including an overall win of the 1963 Tour de France with co-driver José Behra.[5][6] Following Guichet's sale of the car in 1965 and multiple subsequent ownership changes, this car was sold privately in September 2013 for $52,000,000 USD. This broke the then-current record for world's most expensive car.[7]