Downflow Radiator Factory-Fit Natural Finish for 53-56 Ford F100/F250 Mercury M100/M250/M350 Pickup w/Auto Trans Radiator Be CoolO. E. M. radiators are just that, O. E. M. They are designed to cool stock applications and overheating can take the fun out of using your specialty vehicle quickly. Now, Be Cool has your answer in one of six different radiator series: Factory Fit, Aluminator, Qualifier, Universal, O. E. and Conversion. Crossflow radiators are constructed with their tanks on the sides, while a Downflow radiator has its tanks on the top and bottom of the core. A