The NHRA Technical Department has released additional 2023 Rule Amendments. Unless otherwise noted in this document, these additional amendments will come into effect immediately. The 2023 NHRA Rulebook Amendments can be found under the Rules section of NHRARacer.com.

These amendments include the following changes…

• Pro Mod – Minimum weights changed.
• Pro Mod - Add 20lbs for any 4.9 bore space supercharged combination.
• Pro Mod – Converter pressure data logging required.
• Pro Mod - Protective Equipment (Driver’s Suit) Updated.
• SS Modified – Engine, rulebook correction.