In an effort to reduce the speeds generated at Le Mans and other fast circuits of the day by the 7 litre Ford prototypes, as well as to entice manufacturers who were already building 3 litre Formula One engines into endurance racing, the Commission Sportive Internationale (then the independent competition arm of the FIA) announced the World Championship of Makes would be run for 3 litre open prototypes for four years from 1968 through 1971. The 917 is one of the most iconographic sports racing cars of all time largely for its high speeds and high horsepower outputs and was even made into a movie star by Steve McQueen in his film Le Mans. In the 1973 CanAm series, the turbocharged version Porsche 917/30 developed over 1100 bhp, and as much as 1500bhp in qualifying tune. Powered by the Type 912 flat-12 engine of 4.5, 4.9, 5 or 5.4 litres, the long-tailed version was capable of a 0-62mph time of less than 2.5 seconds and a top speed of over 248 mph (394 km/h). The Porsche 917 is a racecar that gave Porsche its first overall wins at the 24 hours of Le Mans in 19. Two-door coupe, 'K' for short-tail, 'L' for long-tail (endurance racing)
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