The NASCAR Sprint Cup wraps up its West Coast tour with Sunday's race The Auto Club 400 at Auto Club Speedway in Fontana and Brian Vickers helps out Tony Stewart for another week.

FOX's Marghiee Teshineh reports:

The NASCAR Sprint Cup wraps up its West Coast swing with a stop at the Auto Club Speedway at Fontana.

Brad Keselowski says being the current defending race champ means a lot to him:

(Keselowski) "You know that's always an honor and something you take a lot of pride in and you think about last year's events throughout the weekend. So I'm excited about that. Of course I want to win it again, so we got to keep our head down and stay focused as well, but it will be a happy return for sure."

Auto Club will be the first two mile track of the season to feature the new Areo rules package... And for Brad:

(Keselowski) "You know I'm not really sure what to expect at Auto Club. I think we have seen great racing in the last few years. Arguably the best racing in NASCAR Sprint Cup Series racing history. And hopefully we'll continue to see the same."

Keselowski will have to fight off challengers like California native Jimmie Johnson, who leads the pack with five career wins at the track.

And good news for Brian Vickers, he'll be back this weekend driving the No. 14 car for the still ailing Tony Stewart.

Marghiee Teshineh, FOX News.