IROC VI was the sixth year of IROC competition, which took place in 1978 and 1979. The format changed from IROC V in that three qualifying races were held for participants from NASCAR, USAC Champ Car, and Road Racing (which primarily consisted of Formula One, SCCA, and IMSA). The top four finishers in these qualifying races then earned the chance to race in the two final races at Riverside International Raceway and Atlanta Motor Speedway. It used the Chevrolet Camaro in all races. Mario Andretti won the road racing finale en route to the championship and $75,000. The final points standings were as follows:

Race results

Qualifying Races

NASCAR Qualifying Race, Michigan International Speedway

USAC Champ Car Qualifying Race, Michigan International Speedway

Road Racing Qualifying Race, Riverside International Raceway

Final Races

Road Racing Final, Riverside International Raceway

Oval Final, Atlanta Motor Speedway