For the first time in IROC history, the series champion was determined in a tiebreaker after the last race, with Harry Gant winning over Darrell Waltrip. In Race 1, it was Waltrip who came out on top, in one of the wildest finishes in racing history. Waltrip started 11th and was running fourth exiting the last turn when Tom Sneva touched the rear of Cale Yarborough's car, knocking Yarborough into leader A. J. Foyt. Those three, along with Bobby Rahal, spun, clearing a path for Waltrip to the checkered flag. In Race 2 at Mid-Ohio, Mario Andretti led from the pole until Rahal bumped him in a passing attempt less than two laps from the finish. Andretti spun off course, and Rahal went on to win at his "home" track. Race 3 at Talladega was rained out. Gant came into the last race at Michigan ninth in the point totals but led the most laps and retook the lead from Terry Labonte on the last lap to gain the victory. Waltrip finished fourth and both he and Gant had scored 45 points. Under IROC rules, Gant was declared champion because he finished higher in the final race. (from IROC Website)

Final Points
IROC 9 Champion Harry Gant
Position	Driver/Residence/Sanction	Points	Money Earned
1	* Harry Gant/Taylorsville, NC/NASCAR	45	$158,200
2	Darrell Waltrip/Franklin, TN/NASCAR	45	80,400
3	Bobby Rahal/Dublin, OH/CART	40	55,100
4	Tom Sneva/Paradise Valley, AZ/CART	32	43,000
5	* Terry Labonte/Archdale, NC/NASCAR	31	39,300
6	Derek Bell/England/FISA	31	30,000
7	John Watson/N. Ireland/FISA	30	29,000
8	Cale Yarborough/Sardis, SC/NASCAR	29	27,400
9	A. J. Foyt/Houston, TX/CART	28	29,500
10	Jochen Mass/St. Jean-Cap-Ferrat, France/FISA	27	23,000
11	# Mario Andretti/Nazareth, PA/CART	25	26,700
12	Tom Gloy/Lafayette, CA/SCCA	13	20,000
* Tiebreaker, higher finish in final race # Injured, did not compete in final race