Kyle Busch, driver of the #18 Z-Line Designs Toyota, races Tony Stewart, driver of the #5 Delphi Chevrolet, during the NASCAR Nationwide Series Dollar General 300. (Photo by John Harrelson/Getty Images for NASCAR) hide

Kyle Busch, driver of the #18 Z-Line Designs Toyota, races Tony Stewart, driver of the #5 Delphi Chevrolet, during the NASCAR Na... more