NASCAR's Sprint Cup Series heads to Fontana for Sunday's Auto Club 400.  Kevin Harvick is set to defend his Auto Club 400 title from a year ago, and one lap is all it took.  There were 18 lead changes among 10 drivers during the 200-lap race.  Kyle Busch dominated, leading five times for 151 laps and Jimmie Johnson led for laps 198 and 199, but it was Harvick who outdueled them both down the stretch to take the checkered flag for his 15th career win.  The pole sitter has never captured this race in the 15-year history.  Auto Club Speedway, formerly California Speedway, has the distinction of laying claim to the world's fastest two-mile oval.