Episode 4: Low downforce not a drag in Atlanta, Vegas preview

Regan Smith, Jonathan Merryman, Matthew Dillner and Chuck Bush take a detailed look at Matt Kenseth's pit penalty, and how the black flag looks from the driver's seat. The Dirty Air gang also breaks down an exciting race at Atlanta Motor Speedway and look ahead to how a less abrasive surface will impact the racing at Las Vegas Motor Speedway.