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NASCAR Cup Series teams will compete with a simplified diffuser this season as part of a short track and road course rules package announced on Wednesday. The updates follow the two-day test at Pho…
This season, NASCAR Cup Series teams will use a simplified diffuser as part of a rules package for short tracks and road courses. This decision was made following a test at Phoenix Raceway in December. NASCAR has been testing different packages in order to enhance the quality of racing on short tracks and road courses. The package will be used on short tracks that are one mile or shorter, except for Bristol Motor Speedway and Dover Motor Speedway. It will also be implemented in all five road course races. The goal of the updates is to improve traffic and allow drivers to have more control over their cars on short tracks.