CSF Universal Triple Pass Dual Core Radiator w/AN Fittingswind tunnel, vibration, thermal cycle, and burst pressure testing. Universal Fit Allows for Mounting in Multiple Different Configurations. The Triple Pass Flow Structure allows the coolant to flow across the core of the radiator three times before exiting for lowest outlet temperatures possible. This radiator features a 2 Row core with CSF's exclusive B Tube Technology: Unlike a regular oval shaped "O" type radiator tube, CSF uses a specially