Kevin won the Toyota/Save Mart 250 on Sunday at Sonoma Raceway, scoring his first win of the season and also the first of his career on the tricky, demanding 1.99-mile road course.
With five laps to go, Harvick held an 8.5-second lead on Clint Bowyer, his Stewart-Haas Racing teammate who was coming fast behind him.
Bowyer ended up finishing second, with Brad Keselowski, Denny Hamlin and Kyle Busch rounding out the top five.
Harvick thus led a 1-2-3 finish for Ford.
Martin Truex Jr. won the first stage in his No. 78 Furniture Row Racing Toyota, giving him a series-high 11 on the season.