The 19-year-old Heim from Marietta, Georgia, overtook teammate Chandler Smith on the final lap to notch his first Truck career victory on Atlanta's newly reconfigured surface.
"It’s been a tough road, for sure," said Holmes. "Everything we’ve done has just been phenomenal this season, every decision we’ve made. To come out and not even know we were going to run the full season, and to finish it off like this, is really special."