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Ambrose passed Allmendinger again on the next lap, then sailed past Kurt Busch in turn one on lap 50 and began to chase Montoya for the second time.

Ambrose pulled back on Montoya’s back bumper on lap 58 with Brad Keselowski fighting to stay on the lead lap as the two filled his rearview mirror with their final pit stop looming.

Both pitted together with 30 laps remaining and Montoya beat Ambrose out before a caution flew for debris.

Montoya held off Ambrose when the race restarted, but two laps later Stewart clipped Boris Said in the exit of turn one, a hard downhill right-hander, sending Said into the guardrail to bring out another caution.

That erased any worries about fuel in case of overtime, but as soon as the race restarted, Jimmie Johnson and Denny Hamlin were involved in a crash in turn 7 to bring out another caution. Johnson’s No. 48 Chevy slammed a retaining wall and the front of Hamlin’s No. 11 Toyota was crushed.

“He’s driving a great race,” Ambrose said of Montoya during the caution. “He’s really hard to pass. It’s going to be a big battle. I’m going to see if I can force him into a mistake. I just want to be clean until the end.”

There were no mistakes this time as Montoya gave Earnhardt Ganassi racing just its third victory of the season.