There will be six classes at the event determined by points scored in the Subinats Class Calculator, an online tool. 

The Class Calculator must be submitted after you register for the event and prior to competition.

The classes are:

• Naturally Aspirated (NA)
• Street
• Clubman
• Sprint
• Track
• Open

Champions in each class and overall will be determined by the addition of their best time from each circuit over the day of competition.