RULES - NATIONAL COMPETITION RULES - UNLIMITED CATEGORY
Unlimited Category is for production-based vehicles prepared beyond Sport, Tuner and Max which means any vehicle on DOT tires with less than 200 treadwear or on non-DOT tires. We do not expect these vehicles to be streetable. This is where you will find Time Attack monsters, Tube Frame GT cars and race cars that don't fit with the street-driven philosophies of the other categories.
As with Max, Unlimited Category vehicles may only be driven, stopped and steered through the wheels and tires. When the word “unrestricted” is used in these rules, it is under the assumption that the modifications and controls are within this parameter.
Unlimited Category - Authorized Modifications
Unlimited Category vehicles may do any modification listed in Sport, Tuner and Max Categories, plus allowances listed below.
Unlimited Category Classing
Unlimited is divided into two categories: Unlimited 1 (U1) and Unlimited 2 (U2). There is absolutely no guarantee of competitiveness for any vehicle in Unlimited Category, even though there will absolutely be a wide range of vehicle performance.