International Speedway Corporation

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Austin Dillon laughs as he prepares to climb into his car before the first of two NASCAR Sprint Cup series qualifying auto races at Daytona International Speedway in Daytona Beach, Fla., Thursday, Feb. 20, 2014. (AP Photo/John Raoux)

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Dale Earnhardt Jr., left, talks with team owner Rick Hendrick before the first of two NASCAR Sprint Cup series qualifying auto races at Daytona International Speedway in Daytona Beach, Fla., Thursday, Feb. 20, 2014. (AP Photo/Terry Renna)

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Austin Dillon (3) and Greg Biffle (16) lead the field at the start of the first of two NASCAR Sprint Cup series qualifying auto races at Daytona International Speedway in Daytona Beach, Fla., Thursday, Feb. 20, 2014. (AP Photo/Terry Renna)

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Austin Dillon, left, and Greg Biffle, right, lead the field at the start of the first of two NASCAR Sprint Cup Series qualifying auto races at Daytona International Speedway in Daytona Beach, Fla., Thursday, Feb. 20, 2014. (AP Photo/David Graham)

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Kasey Kahne, Bobby Labonte, Justin Allgaier, and David Ragan, from left, drive along the front stretch during an evening practice for the Daytona 500 NASCAR Sprint Cup Series auto race at Daytona International Speedway in Daytona Beach, Fla., Wednesday, Feb. 19, 2014. (AP Photo/John Raoux)

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Dale Earnhardt Jr., bottom front, and Tony Stewart, top front, lead a group of cars down the front stretch during an evening practice for the Daytona 500 NASCAR Sprint Cup Series auto race at Daytona International Speedway in Daytona Beach, Fla., Wednesday, Feb. 19, 2014. (AP Photo/John Raoux)