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(AP) - Kurt Busch has earned his first career road course victory with a dominating performance at Infineon Raceway.

Busch led a race-high 76 laps and beat Jeff Gordon by almost 4 seconds for his first win of the season.

It marked a total turnaround for Busch and his Penske Racing team, which struggled mightily last month and made behind-the-scenes personnel changes to adapt.

Carl Edwards finished third Sunday, followed by Clint Bowyer and Marcos Ambrose.

The race featured several on-track flare-ups, most notably Brian Vickers' payback spin of Tony Stewart.

The bump sent Stewart's car spinning into a stack of tires, and the rear of his Chevrolet came to a rest on top of the stack.