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…

• Stock/Super Stock - Beginning January 1, 2024, SFI Flexplate mandatory on all V8 vehicles.
• Factory Stock Showdown – Remote mounted oil filter permitted.
• Top Alcohol Funny Car - AF/FC nitromethane percentage changed.
• Pro Stock Motorcycle – Minimum weights changed.