Carl Edwards is doing his best to chase down Jimmie Johnson with two races left. Who has the edge at Phoenix and Homestead?

Petty Enterprises offers an inside look at how a splitter is adjusted in preparation for testing.

Jeffrey Bordner of Concord, N.C.-based Windshear explains how their 180-mph 'rolling-road' wind tunnel provides a more accurate simulation of aerodynamic conditions on the underside of a vehicle.

Drivers look back at some of the most memorable moments in Daytona 500 history, including Dale Earnhardt's death in the final lap of the 2001 race, and Darrell Waltrip's first win there on his 18th try in 1989.

With spots in the Chase for the championship on the line, here is an overview of the track at Richmond International Speedway for the race on Sept. 6.

Want to find out more about your favorite driver? Click on any photo to get more information.

With Franchitti, Carpentier, Villeneuve and Allmendinger among those making the transition to NASCAR from open-wheel racing, see the differences between the cars and the challenges these drivers could face.