Byron went the last 144 laps of the 350-lap race without a stop en route to his second victory of the season – he won the Daytona 500 in February – and 15th overall. He also took the season points lead from Hendrick Motorsports teammate Chase Elliott.

The challenges will be immense for NASCAR Cup drivers and teams in today’s race at Indianapolis Motor Speedway.

William Byron nursed his car to the finish line at Iowa Speedway as the whole team held its breath there was enough fuel to take the checkered flag.