Sunday 29th April 1973
Brian Redman won the season opening SCCA Formula 5000 race at Riverside International Raceway, California, US. A new race format debuted featuring two 60 mile qualifying heats followed by a 100 mile final. At the start of the 100 mile feature race, Brett Lunger jumped into the lead followed by Redman and Jody Scheckter. Lunger continued to lead with Redman pressuring, until the halfway point when a stuck throttle sent Lunger for a brief off course excursion. Lunger pitted his Carl Hogan Lola T330 for a quick damage check, returning to eventually place 6th. Redman went on to take his Jim Hall/Carl Haas owned Lola T330 across the line first with Scheckter driving his Trojan T101 to 2nd and 1969 champ Tony Adamowicz taking 3rd in another Lola T330.