In 1957, the excellent performance of the 450S naturally destined it to race at the 24h of Le Mans.
A body was specially designed by the Englishman Costin and shaped by Zagato. It increased its aerodynamics but the heat of the engine in the cockpit was important.

Developed as a matter of urgency and ready for a week of the event, it was sorely lacking in fine tuning and had to abandon following a transmission failure after 32 laps of the famous Le Mans loop ...

Left for the USA, it was modified but never raced again.