It was quite a week for Matt Kenseth. On appeal, NASCAR lowered the tough penalties against his team for an illegal engine part used at Texas Motor Speedway, then on Saturday night at Darlington he passed teammate Kyle Busch with 13 laps to go to win the Southern 500 for the first time. And it came without his regular crew chief. Jason Radcliffe sat out Saturday night after his one race suspension for the illegal part. Kenseth had won three Nationwide races at Darlington, but it was his first in the Cup series and it’s his third victory this season.