The IROC Porsches: The International Race of Champions

The IROC Porsches tells the story of the legendary 1973–74 International Race of Champions season, where racing icons from Formula 1, IndyCar, and NASCAR—including Emerson Fittipaldi, AJ Foyt, Richard Petty, and Mark Donohue—competed in identical Porsche 911 Carrera RSRs.

Orchestrated by Roger Penske and built by Porsche, this groundbreaking series pitted the world’s best drivers against each other in equal machinery to crown the ultimate champion—a unique, never-repeated chapter in motorsport history.