Class 1, 1A & 1B - Mondello Park

What am I?

This class has sub classes within it:

Class 2 is for 2 Wheel Drive Rally Cars up to 1450cc normally aspirated.

Class 2A is for  Cars up to 1450cc with only 2 valves per cylinder.

Class 2B is for Cars up to 1450cc with more than 2 valves per cylinder.