For a PDF of the redlined version of the previous Max 5 rules, click here

1. Max 5 eligible vehicles include production vehicles of more than 1,000 examples 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. Unmodified naturally aspirated USDM 4-cycle engines between 1.9x and 3.0L OE measured displacement 2550lbs.

B. Modified naturally aspirated 4-cycle engines of up to 1.9L OE measured displacement: 2200lbs.

C. Unmodified naturally aspirated 4-cycle engines of up to 1.9L OE measured displacement: 1900lbs.

D. Unmodified naturally aspirated rotary or 2-cycle engines of up to 1.25L 1.5L OE measured displacement: 2550lbs.

E. Unmodified single-unit forced induction 4-cylinder, 4-cycle engines of up to 1.9L OE measured displacement: 2650lbs.

F. Electric vehicles with unmodified OE batteries and up to 100KW 175KW of OE rated motor(s): 2550lbs.

2. All Max 5 eligible cars underweight by up to 300lbs go to Max 4. Lighter than that, welcome to Unlimited.