Kurt Busch passed brother Kyle with 24 laps left and won the NASCAR Cup Series race Sunday to complete a sibling weekend sweep at Atlanta Motor Speedway.

Kurt Busch raced to his first victory of the season, 33rd overall and the fourth of his career at Atlanta. He locked up a spot in the playoffs and possibly improved his chances of securing a new ride next season.

Kyle Busch reclaimed the lead with 47 laps remaining, but couldn’t hold off his older brother on Lap 236. Kurt Busch took advantage of lapped traffic to pass his brother.

Kyle Busch pushed for the lead with eight laps remaining, but 42-year-old Kurt pulled away in the final laps to win by 1.237 seconds.

Kyle Busch won the Xfinity Series race Saturday, giving him five wins in his maximum five races in the series this season. He said he doesn’t plan to return to the Xfinity Series next season.

Kurt Busch’s contract with Chip Ganassi Racing expires at the end of the year, and Ganassi sold the team to Trackhouse Racing owner Justin Marks this month.

It was the final race for the current surface on the Atlanta Motor Speedway track. It was installed in 1997 and is the oldest on the NASCAR circuit. Construction on a repaving and reprofile project will begin immediately.