Building your own ULTRA4Stock Modified, Stock or Legends car? Find out all the rules before you start your build. All safety rules must be followed by all classes.

Download the ULTRA4 Rule Book.

Stock, Modified Stock, Legends and Spec Classes: see sections 6.3 and 6.4 and 6.5 in the ULTRA4 Rule Book

UTV Drivers: Classes have been simplified to Pro and Sportsman for 2014. Pros will be racing for a purse and Sportsmen will be racing for a trophy. Please consult the ULTRA4 2014 Rulebook section 6.6 for UTV rules for KOH UTV Race.

NEW For 2014!
Please click here to read up on the new rules for 2014
Post Race Vehicle Inspections will be conducted in 2014. Click here to learn more.

Download the document “How to pass Ultra4 Chassis and Tech Inspection”

Ultra4 Chassis & Tech Sheet can be viewed here.

Should you have specific technical questions, please email our tech inspector at [email protected]