The 2014 STP 500 was a NASCAR Sprint Cup Series stock car race that was held on March 30, 2014, at Martinsville Speedway in Ridgeway, Virginia. Contested over 500 laps on the 0.526 miles (0.847 km) oval, it was the sixth race of the 2014 NASCAR Sprint Cup Series. Kurt Busch won the race, his first win with Stewart-Haas Racing, breaking an 83-race winless streak. Jimmie Johnson finished second, while Dale Earnhardt, Jr., Joey Logano, and Marcos Ambrose rounded out the top five. The top rookies of the race were Austin Dillon (15th), Justin Allgaier (23rd), and Kyle Larson (27th).
On the final lap of the Auto Club 400, Kyle Busch passed his brother Kurt Busch and held off a hard charging rookie Kyle Larson to win the race. "Holy cow, what do you expect when you have a green-white-checkered finish and everyone comes down pit road to put on four tires," Busch said. "That's a Days of Thunder thing right there. What do you mean, there's two laps to go, everybody is to pit, Cole. I came off the fourth turn in disbelief that we won this thing, because we were mediocre all day. It was really weird for us, not a race that we're typically used to. But now there's a load off your shoulders that you can go out the rest of the season and race the way you want to." After winning his first Nationwide Series race the previous day, Larson stated that it had "been a really good weekend" and that he had been battling "probably a 12th place car for most of the day".
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The 2015 STP 500 was a NASCAR Sprint Cup Series race held on March 29, 2015, at Martinsville Speedway in Ridgeway, Virginia. Contested over 500 laps on the 0.526 miles (0.847 km) paperclip shaped short track, it was the sixth race of the 2015 NASCAR Sprint Cup Series season. Denny Hamlin won the race while Brad Keselowski finished runner-up. Joey Logano, Matt Kenseth and David Ragan rounded out the top five.
Joey Logano won the pole for the race and led 91 laps on his way to a third place finish. Kevin Harvick led the most laps – leading 154 – on his way to an eighth place finish, ending an eight consecutive race streak of finishing first or second. The race had 31 lead changes among 13 different drivers, as well as 16 caution flag periods for 112 laps.
Hamlin's 25th career victory was his fifth win at Martinsville Speedway and the eighth at the track for Joe Gibbs Racing. The win moved Hamlin up to eighth in the points standings, which were still headed by Harvick; he left Martinsville with a 24 point lead over Logano. Despite being the winning manufacturer, Toyota still trailed Chevrolet by 37 points in the manufacturers' standings, in third place.
The 2012 STP 400 was a NASCAR Sprint Cup Series stock car race held on April 22, 2012 at Kansas Speedway in Kansas City, Kansas. Contested over 267 laps, it was the eighth race of the 2012 season. Denny Hamlin of Joe Gibbs Racing took his second win of the season, while Martin Truex, Jr. finished second and Jimmie Johnson finished third.
Kansas Speedway is one of ten intermediate to hold NASCAR races. The standard track at Kansas Speedway is a four-turn D-shaped oval track that is 1.5 miles (2.4 km) long. The track's turns are banked at fifteen degrees, while the front stretch, the location of the finish line, is 10.4 degrees. The back stretch, opposite of the front, is at only five degrees. The racetrack has seats for 82,000 spectators.
Before the race, Greg Biffle led the Drivers' Championship with 273 points, and Matt Kenseth stood in second with 254. Dale Earnhardt, Jr. was third in the Drivers' Championship also with 254 points, one ahead of Martin Truex, Jr. and five ahead of Kevin Harvick in fourth and fifth. Denny Hamlin with 242 was eight ahead of Tony Stewart, as Jimmie Johnson with 233 points, was eight ahead of Ryan Newman, and fourteen in front of Clint Bowyer. In the Manufacturers' Championship, Chevrolet was leading with 48 points, six ahead of Ford. Toyota, with 34 points, was 30 points ahead of Dodge in the battle for third.Brad Keselowski was the race's defending race winner after winning it in 2011.