NASCAR 's secondary racing division, the Xfinity Series, will undergo a name change in 2026 as a result of a new sponsorship deal with O'Reilly Auto Parts. Xfinity has held the naming rights since 2015, but that will change next year to the NASCAR O'Reilly Auto Parts Series.

It was the Busch Series, Nationwide Series and Xfinity Series. Now, NASCAR has a new name partner for its second-tier circuit.

Xfinity has held the naming rights to NASCAR's No. 2 division since 2015, but next year, it will be known officially as the NASCAR O’Reilly Auto Parts Series. The company will be the fourth brand to hold the naming rights to the popular series,