Purpose built as a racecar, it was nonetheless also used as a great road car. Won the 24 Hours of Le Mans for four straight years, 1966 through 1969. It's the Ford that defeated Ferrari.
Porsche built 25 917s for homologation in 1969. It won Le Mans in 1970 and 1971, only losing when the rules changed. The 917 still holds the Le Mans fastest lap record.
