S1, E4: Time is running out as the Daytona 500 is just days away. Austin Dillon, Corey LaJoie, and Tyler Reddick compete in the Duels, the races that set the starting order for the 500. LaJoie and his Go Fas Racing team face a major setback while Dillon contemplates impending fatherhood.  Reddick takes to the sky with the US Air Force Thunderbirds.