ULTRA4 Rule Book       Description of Points     Bulletin 2020:2     Bulletin 2002:3

Building your own ULTRA4, Stock Modified, Stock,  Legends, or UTV? 
Find out all the rules before you start your build. All safety rules must be followed by all classes.

Download the ULTRA4 Rule Book. – Updated 12/1/2019 for 2020 season – updates are highlighted in RED. Table of Contents is Clickable. 

Stock – 4600 - 8.3
Modified – 4500 - 8.4
Legends – 4800 - 8.4.11
UTV Class - 4900- 8.6

Ultra4 Chassis & Tech Sheet can be viewed here.

Should you have specific technical questions, you must cite the section of the rule book to which your question pertains and email our tech inspector at