Keselowski started 10th and Busch started fifth. Keselowski was on Busch’s outside in Turn 2 when Busch got loose and washed up into the No. 2 Ford.
The contact cut Keselowski’s left rear tire and caused significant damage to Busch’s right front fender.
Keselowski returned to the track in 39th and Busch in 40th after their pit stops. Keselowski finished Stage 1 in 26th, one lap down. Busch finished the stage in 30th, two laps down.
Keselowski returned to the lead lap by the end of Stage 2. Busch was the recipient of the free pass after a caution on Lap 179 to get back on the lead lap.
Busch transferred to the championship race at Homestead-Miami Speedway after he won last week’s race at Martinsville.
Keselowski entered the race 29 points inside the top four in the playoff standings.