Harbaugh, 49, a former Indianapolis Colts quarterback and co-owner of Panther Racing, based in Indianapolis, will lead the 33 competing cars in a 2014 Chevrolet Corvette, The Indianapolis Star reported Wednesday.
"I already had a dream about it. I know my heart is going to be beating out of my chest," he said.
Panther Racing will have three cars, driven by J.R. Hildebrand, Townsend Bell and Oriol Servia, in the race.
Wisconsin business offering 'therapeutic cuddling' forced to close
Campus cop fatally shoots Texas student during traffic stop