5. Again, the stock-sized radiator is on the left, showing some battle scars. It's actually not the Bronco's original unit, but an OEM-style replacement we'd purchased at 1-800-RADIATOR some years before. It had held up admirably over the years, but the 37-inch tires and a lead foot had taxed it beyond its capabilities. The Flex-a-Lite radiator/fan combo on the right was ready to take on the challenge.