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Ultra4 Unlimited Class
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.
Ultra4 Limited Class
Naturally aspirated engine size shall be no greater than 3.9 litresV 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 Class
Stock body and chassis must be retained. Modifications permitted but must preserve the look of the stock body.
UTV (SxS) Class
Must utilise the stock chassis and maintain stock appearance. Maximum engine displacement is 1100cc.