This car, with Nino Farina (who came out of retirement) driving, tried to qualify for the 1956 Indianapolis 500. It had a 4.4 liter Ferrari six-cylinder engine and American Kurtis 500D chassis. The car failed to qualify. It is not clear how serious this attempt was, as the six-cylinder engines had not been successful at sports car competition and Enzo Ferrari had lost interest. Source: Paraphrased from a museum sign.