Busch had the lead in that race, and he learned his lesson well. With all three up front again on a restart Sunday with 16 laps remaining in the 90-lap race, Busch dived from third to first on the inside of the 90-degree right-hander, outbraking both Ambrose and Keselowski to take the lead for the first time since lap 26.
Busch, who took the lead from Montoya as soon as the green flag flew, kept Keselowski at bay off his back bumper, with Ambrose seven car lengths back, and pulled out to a 1-second lead as Ambrose challenged Keselowski for second.
Ambrose finally got past him in the inner loop on lap 81, but he was 2.3 seconds behind Busch and seemingly running for second until the dramatic finish.
"I managed to fight my way past Brad and then I tried to chase Kyle down, but he wasn't making any mistakes and he had a fast car," Ambrose said. "I just burned my stuff up trying to get to him. I was thinking, 'OK, it may be second place here.' But then the oil came down and I slipped to third and I thought, 'That's not the plan.' So I just put my head down and just kept trying."