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| The Watkins Glen 6 Hours; Watkins Glen, July 24, 1971 |
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| The Ferrari 512M (#6) driven by Mark Donohue and David Hobbs leads the pace lap with the Porsche 917K (#1) of Jo Siffert and Gijs van Lennep. Donohue and Hobbs did not finish due to the collapse of their steering assembly, while Siffert and van Lennep captured second place. |
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