NHRA has posted the online version of the 2021 NHRA Rulebook, available by clicking here, in the Rulebook/Amendments menu on this site, and on NHRARacer.com under Rules. Rules amendments to the 2021 NHRA Rulebook will continue to be posted as needed on NHRARacer.com, which is linked under Rulebook/Amendments on this site. Additionally, the online version of the 2021 NHRA Rulebook will periodically be updated to reflect changes made to the rules amendments documents. Please check NHRARacer.com periodically for notifications of amendments and Rulebook updates.