The NHRA Technical Department has released additional 2025 Rule Amendments. Unless otherwise noted in this document, these additional amendments will come into effect immediately. The 2025 NHRA Rulebook Amendments can be found under Tech, then Rules on NHRARacer.com.

These amendments include the following changes…See the latest amendments document for complete details.

• Section 6, Pro Mod, Tires and Wheels, Wheels – Beginning January 2026, SFI Spec 15.3 rear wheels measuring 16”x18” with double bead locks permitted. If running an 18” wide wheels a liner is not permitted.
• Section 13K, Factory X, Designation – Language updated to include minimum upper supercharger pulley size and maximum overdrive ratio