"Three times this year me and Kyle had contact and I had a chance, capable-winning cars, it's disappointing on the points side and not winning some of these races," Kahne said. "Whether he hit me or just blew the air off, whatever it was, he blew his entry. I'm not sure what he was thinking on that."

Kurt Busch had hoped to go from an upside-down finish when his car went airborne late and crash-landed on Ryan Newman at Talladega last week to his first Sprint Cup victory in two years at Darlington. He set a qualifying record to win the pole Friday and led 69 of the first 73 laps before getting passed by brother Kyle.

Kurt Busch struggled to stay close during the unexpected long stretches of green-flag racing. He was sent a lap down by Kyle on lap 279 and was part of a three-car dustup about 20 laps later that also involved defending series champion Brad Keselowski and Casey Mears.

There would be no joyous moment for Kurt Busch here on the 10-year anniversary of his side-by-side final lap dual with Ricky Craven as he finished 14th. Busch ended up in second, .002 seconds behind in Sprint Cup's closest finish since it went to electronic timing in 1993.

The late accident at Talladega opened the door for the duo from Front Row Racing, David Ragan and David Gilliland to finish 1-2 in last week's race. The pair couldn't capitalize on that success at Darlington. Gilliland was 29th and Ragan 39th.

Danica Patrick improved on her placing in her second Sprint Cup race at Darlington, finishing 28th three spots better than in 2012.