What is Pro 4 Modified Racing?
Pro4 Modified Racing Series is a competitive stock car racing series featuring Pro 4 style racing chassis and bodies powered by 4-cylinder engines. The body styles Are created by the drivers. Every car is different in its own way but must be with in the rules. The cars utilize any single cam, 2 valves per cylinder 2 barrel carburetor normally aspirated 4-cylinder engines up to 2,400cc displacement.