The NHRA Technical Department has released an updated Exhibition Rulebook Supplement. Unless otherwise noted in this document, these changes will come into effect immediately. The Exhibition Rulebook Supplement can be found under the Rules section of NHRARacer.com.

This update includes the following changes… See the latest Exhibition Vehicle Rulebook Supplement for complete details.

• Mountain Motor Pro Stock, Body, Spoilers – Spoiler wicker minimum height changed to 3/4”
• Helmet specifications updated, corrected 8860-2015 to 8859-2015, added 8859-2024