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Porsche 917The Porsche 917 initiated Porsche winning performances at 24 Hours of Le Mans in 1970 and 1971. The car resulted from a change in endurance homologation rules announced in 1968. The new contender class would have engines up to 5 liters and a minimum of 25 produced units was required. The 917 engine was flat 12 with 4,5 liter because for faster development it was built from extension of 3 liter flat 8 of the Porsche 908. The chassis was also developped starting from the 908. The Porsche 917 with closed composite body was first shown at Geneva Motor Show in 1969. Porsche 917 Wallpapers
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