The main testing was performed at Loveland Pass just outside of Denver with two similarly setup 955 Cayennes. Similar miles, same size tires, and both equipped with winches, lights, and other exterior accessories. One was equipped with the CSF Radiator, the other with the OE Radiator. Testing showed a steady 18-20?F degree differential between the CSF and OE Radiator equipped vehicles. Both started out at 186.8?F (86?C) with the OE Radiator ending at 212?F (100?C) and the CSF Radiator ending at 194?F (90?C). These are very impressive real world results on the earlier prototype model.