As a reminder, the Automatic Horsepower Factoring system will not be used during this year’s Chevrolet Performance U.S. Nationals. As a result, runs made by Super Stock and Stock competitors at any time during the event will not count towards class averages, nor will they be used to trigger index or horsepower adjustments.

The AFHS will remain in effect for all other NHRA Mello Yello Series national and Lucas Oil Series divisional events.