The NASCAR Cup Series will run a simplified diffuser at a majority of the tracks 1-mile or less in length, as well as all ...

NASCAR hopes the significant rule book update — a “simplified rear diffuser with fewer vertical strakes” for cars on short tracks and road courses — will help cut downforce in the front ...

NASCAR fans criticize the organization for failing to secure a new manufacturer in the last decade, in contrast to F1.

Kyle Larson slammed NASCAR's NextGen car after encountering ... leading to the rear diffuser grazing the asphalt. It cost valuable seconds, and Kyle Larson was displeased by that.