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 centrifugal superchargers SFI 4.1 ballistic blanket required
• Pro Mod transbrake wiring clarification
• Funny Car ground clearance/rub bar update