FORT WORTH, Texas (AP) -- The Busch Brothers are adding a new dynamic to their relationship.

When Kurt Busch gets in the car for Friday night's NASCAR Nationwide race in Texas, where he ran in that series for the first time and won six years ago, it will be his debut driving for younger brother Kyle's new stock car team.

Kurt Busch describes it's a unique situation with him having the "upper hand on age."

After the first of about 17 Nationwide races with his brother, they will be competitors again Saturday night in the Sprint Cup race.

NASCAR resumes this weekend after the Easter weekend break.

Sprint Cup points leader Greg Biffle has seven consecutive top-10 finishes at Texas and a win there in 2005. And he's coming off a Bahamas vacation.