Teams will not be allowed to alter side skirts

NASCAR Sprint Cup Series teams will no longer be allowed to alter their car's side skirts during an event, a practice that became widespread during the 2014 season. At the NASCAR State of the Sport to kick off the Charlotte Motor Speedway Media Tour presented by Technocom, Executive Vice President of Racing Development Steve O'Donnell said the sanctioning body will bring cars back down pit road if officials see that the side skirts have been manipulated during a pit stop in the race.

O'Donnell said it would police flared skirts "by any means possible," including use of the new pit road technology that will make its debut during Speedweeks at Daytona International Speedway. The pieces, officially known as vertical rocker panel extensions, are located along the bottom of the car's body between the front and rear tires. They help seal the area between the bottom of the car's chassis and the track surface, limiting airflow underneath the vehicle. Not all teams were flaring the pieces last season, but those that did typically would make the adjustment during an early pit stop.

NASCAR allowed the practice to continue as the season progressed, but said on several occasions it was something that would be addressed after the completion of the 2014 season.

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