The seventeenth year of IROC competition took place in 1993. IROC XVII was the fourth and final year the Dodge Daytona was used in competition, and continued the format introduced in IROC VIII. Race one took place on the Daytona International Speedway, race two took place at Darlington Raceway, race three was held at Talladega Superspeedway, and race four ran at Michigan International Speedway. Davey Allison won the series championship posthumously after being killed in a helicopter accident at the Talladega Superspeedway. With only one race remaining, Terry Labonte drove the final race, and the points from that race, applied to Allison's previous total, were enough to secure the championship. The winnings of $175,000 were placed in a trust fund for Allison's children.
The roster of drivers and final points standings were as follows: 
Davey Allison was awarded the championship posthumously. Terry Labonte drove the final race in Allison's place, and Labonte's points were added to Allison's point total.
Alan Kulwicki was killed in a plane crash on April 1, 1993. Dale Earnhardt drove in his place, and all the points Earnhardt earned were applied to Kulwicki's point total. The prize money for finishing fifth in points was donated to the Winston Cup Racing Wives Auxiliary, Brenner Children's Hospital and St. Thomas Aquinas Church charities.
Geoff Brabham and Harry Gant tied for sixth place in the final points standings, but Brabham was awarded the position due to a better finishing position in the final race.
Juan Manuel Fangio II withdrew from the series before the final race.
Dale Earnhardt started in place of an injured Al Unser, Jr., Earnhardt was awarded no points for the race, and Unser, Jr. shared 11th and 12th place points with Arie Luyendyk, who also did not start due to injury.
Rusty Wallace started in place of an injured Arie Luyendyk. Wallace did not receive points for the start, and Luyendyk shared 11th and 12th place points with Al Unser, Jr., who also did not start due to injury.
Dale Earnhardt took the place of the late Alan Kulwicki beginning with race three, and all points earned were added to Kulwicki's total.
Terry Labonte drove in place of the late Davey Allison for the final race, with all points earned added to Allison's total.