2026 Ultra4 Rulebook | King of the Hammers

Ultra4 Rulebook

Version 6.6 | Updated for 2026

Table of Contents

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INTRODUCTION

Copyright

Introduction / Overview

Applicability

Participants

Equipment

Document Conventions

Precedence

Terms / Disclaimer / Liability

TECHNICAL RULES

Technical Inspection & Impound

COMMON VEHICLE REQUIREMENTS

Serviceability

Safety Equipment

Vehicle Identification

General Vehicle Components

Roll Cages

Engine

Transmission

Transfer Case

Driveshafts

Steering

Suspension

Brakes

Controls

Fuel System

Fasteners

Electrical System

Wheels & Tires

Vehicle Weight

CLASSES

4600 Stock Class

4500 Modified Class

4800 Legends Class

4400 Unlimited Class

4900 UTV Class

17 & UNDER

Youth Racing League

EVENT RULES

Pit Support Vehicles

Event Officials

Event Participants

Event Course

Series Points & Championships

Infractions & Penalties

Protests & Grievances

Competitor Board

REFERENCE

Appendix A: Glossary

Appendix B: Seatbelt Installation Guide

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