The 2013 STP 400 was a NASCAR Sprint Cup Series stock car race that was held on April 21, 2013 at Kansas Speedway in Kansas City, Kansas, United States. Contested over 267 laps on the 1.5–mile tri-oval, it was the eighth race of the 2013 Sprint Cup Series championship. Matt Kenseth of Joe Gibbs Racing won the race, his second win of the 2013 season and second straight at Kansas Speedway, while Hendrick Motorsports teammates Kasey Kahne and Jimmie Johnson finished second and third.
This was the third straight Sprint Cup race of 2013 where the winner won from the pole and led the most laps, following wins by Jimmie Johnson at Martinsville and Kyle Busch at Texas. This was the first such streak in over 28 years.