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11K views · 1.4K reactions | This tribute to the IROC series caught our eye at the Concours d'Elegance and we actually made a video on all our favorite Porsches. If you haven't watched it yet, made sure to check it out https://youtu.be/6k5sHpXnR1Q | Porsche Club of America | Facebook

It is the year 1974 and in the USA the "International Race of Champions", "IROC", was held for the first time. In the IROC, the then best Formula 1 and Indycar stars competed against each other on a completely identical Porsche 911 RS 3.0. The series was founded in 1973 by the president of the Riverside International Raceway, Les Richter, and Roger Penske. Mark Donohue won the first title in 1974. Unfortunately it should be his last victory because he died a year later in a Formula One session.