Only 4,076 of these most extravagant cars were built over their 11 years in production. When Cadillac was the standard of the world, this was the car that set that standard.
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.
