The 10-year agreement with XFINITY replaces Nationwide as No. 2 NASCAR series sponsor.
XFINITY is the cable and broadband division of Comcast, providing video, high-speed Internet and phone service to residential customers.
The 10-year agreement officially begins Jan. 1, 2015 and will see the series renamed the XFINITY Series.
XFINITY becomes only the third title sponsor in the program's history, following Anheuser-Busch (1982-2007) and Nationwide ('08-14).
The series will now be the XFINITY Series.