The Aeroflow Performance universal heat exchanger is a dual pass/single row design which allows the coolant to flow across the core of the heat exchanger two times before exiting the radiator for the lowest outlet temperature possible. In a liquid-to-air intercooler system or a supercharger setup, the air is cooled by liquid, typically water. These systems require a supplemental heat exchanger to cool the liquid running through the intercooler. it is recommended this type of heat exchanger is front mounted and/or accessible to fresh air flow for optimal performance.