NHRA announced on Wed. January 11, 2017, adjustments to Pro Modified parity by adjusting two of the three power adders' combinations.

"Based on performance numbers from the 2016 NHRA J&A Service Pro Mod Racing Series season, the NHRA Technical Department is decreasing the minimum weight of the Nitrous assisted entries by 25 pounds," a posting on NHRARacer.com confirmed. "The new allowable minimum weight for Nitrous assisted entries will be limited to a minimum of 2,450 pounds. Additionally, maximum supercharger overdrive will be increased from 14.55 to 20.00 for Supercharged entries. These rule changes will go into effect immediately."