Based on the FLEXJET NHRA Factory Stock Showdown performance numbers from the Lucas Oil NHRA Nationals in Brainerd, MN, the NHRA Technical Department is increasing the supercharger overdrive by changing the upper supercharger pulley for the 2021 Dodge Drag Pak 354 from 3.750 inches to 3.625 inches. This rule change will go into effect immediately. NHRA reserves the right in the future to make additional rule changes to control performance and maintain parity in the category.