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.

768K views · 10K reactions | Dale Earnhardt Jr.'s racing at Michigan International Speedway today! Flashback to this classic finish at Michigan in the 1999 IROC Series between Jr. and his father Dale Earnhardt -- the elder getting the win by .007 seconds. (2:30P ET on #RacingWeekNBCSN) | NASCAR on NBC | Facebook

Wir schreiben das Jahr 1973 und in in den USA wurde das "International Race of Champions", kurz "IROC", zum ersten Mal ausgetragen. In der IROC traten die damals besten Formel 1- und Indycar-Stars auf komplett identischen Porsche 911 RS 3.0 gegeneinander an. Die Serie wurde im Jahre 1973 vom Präsidenten des Riverside International Raceway, Les Richter, und Roger Penske gegründet. Mark Donohue gewann den ersten Titel im Jahre 1974. Es sollte leider sein letzter Sieg sein, denn er verstarb ein Jah

A little flashback to some straight up IROC karma! thanks to @ihave40winsonYT off X for sharing! | Seriously Fast Motorsports

14K views · 124 reactions | The Top 10 highlights from March are here! Watch the full video at the link below: https://www.youtube.com/watch?v=qA1l2gS45e8 | iRacing | Facebook

9.3K views · 45 reactions | ️Where is IROC going next? Tune in to our FREE 24/7 Streaming Channel tonight at 8:00PM ET to catch IROC ‘The History’ with Ray Evernham! : How to Watch: https://hubs.ly/Q03wqSsP0 | Racing America | Facebook