The Can-Am Porsche 917 The Can-Am Race Series, held from 1966 to 1974, helped propel professional sports car racing to new heights of popularity in the United States. The series was governed by an open and simple set of rules, which created an environment that brought the most powerful and fastest sports cars to race...

Mid-Ohio, August 12, 1973. George Follmer, in the Rinzler-entered Porsche 917/10K, fights off a hard-charging Mark Donohue, in the Penske-run Porsche 917/30. Donohue would go on to win, with Follmer finishing 2nd—a result to be duplicated most of that season.
Photo: Hal Crocker
The Penske Panzer
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