Spoon Sports Aluminium Race RadiatorWhile the thickness of the factory standard FK8 radiator is quite large coming in at 27mm, coolant temperature during hard driving can exceed 100C. In order to fully demonstrate the performance of the engine, it is essential to keep coolant temperature under control. Generally as the thickness of a radiator core increases, the cooling efficiency rises. However as thickness increases, the airflow through the unit can decrease which reduces efficiency,