This is just a brief overview of the basic class differences that race in ULTRA4.
Please Note: If you are planning on building and racing a car, you MUST consult the rulebook for ALL requirements for your desired class! This page is just a brief overview of the class differences.
| Class |
Characteristics
|
| Ultra4 Unlimited |
- These cars are not limited on tire size, engine or chassis design, other than to meet the safety requirements for the class. Unlimited cars must have a transfer case and be able to be driven in 4WD. These cars can be straight axle, or independent front suspension (IFS).
|
| Ultra4 Limited |
-
Naturally aspirated engine size shall be no greater than 3.9 litres V configuration or 4.0 litres straight configuration. Forced induction engines shall be no greater in size then 2.0 litres. No boring or stroking of original engine displacement.
|
| Modified |
- Stock Chassis must be retained
- Stock body must be complete. Modifications permitted but must preserve the look of the stock body.
- Any engine permitted
- Tyres can have a maximum outside diameter of 37.5"
|
| UTV |
- Must utilise the stock chassis and maintain stock appearance
- Any engine permitted
- Maximum engine displacement is 1100cc.
- No limits on wheels and tyres
|
