For a PDF of the redlined version of the previous Max 1 rules, click here.

1. Max 1 eligible vehicles include production vehicles and eligible kit cars powered by the following OE engine displacement or KW-rated motor(s) and not weighing less than the corresponding minimum weight (with driver):

A. Naturally aspirated 4-cycle engines 3.0L and greater OE measured displacement: 2500lbs.

B. Naturally aspirated rotary or 2-cycle engines greater than 2.0L OE measured displacement: 2500lbs.

C. Unmodified single-unit forced-induction engines between 4.5L to 6.4L OE measured displacement: 3000lbs.

D. Modified, Unmodified, or added forced-induction engines up to 4.5L (4-cycle) or 1.5L (Rotary/2-Cycle) OE measured displacement: 2500lbs.

E. Electric vehicles with greater than 400KW OE rated motor(s): 2500lbs

2. Any vehicle underweight or built beyond above allowances goes to Unlimited. (I.e., any Modified FI motor above 4.5L, or any Forced Induction motor over 6.4L)

3. Max 1 eligible vehicles include the following low-production vehicles (less than 1,000 examples), and kit cars otherwise underweight for their indicated OE engine displacement and aspiration:

A. Vehicles which meet power, displacement and configurations for the classes below, not weighing less than 1600lbs (with driver).