Busch and Larson dueled the final 11 laps of the stage. They made contact while racing in traffic while racing to Lap 125 of the scheduled 500-lap event.
Busch seeks to win the Camping World Truck, Xfinity and Cup races this week at Bristol for the second time in his career. He won all three races in 2010.
After Busch, who started 18th, was pole-sitter Erik Jones. Larson finished third. Chase Elliott was fourth. Matt Kenseth placed fifth. Kenseth was followed by Denny Hamlin, Ryan Blaney, Joey Logano, Martin Truex Jr. and Jimmie Johnson.
The stage win is Busch’s 10th of the season. Only Truex (15 stage wins) has more this season.
A couple of drivers had problems early in the race.
Brad Keselowski suffered a cut left front tire on Lap 5 and lost four laps by the time he pitted and got new tires. He was 38th at the end of the stage.
Aric Almirola brought out the caution on Lap 61 when he hit the wall. He was 33rd at the end of the stage.