Fit For WRX VA FA20DIT 2.0L 2015-2017 Turbo Manual Transmission Aluminum Radiator. It allows the turbocharger to operate at higher boost pressures safely, thereby unlocking greater potential power output from the engine. The intercooler enhances engine reliability and longevity by reducing thermal stress on pistons, valves, and other parts exposed to high temperatures. Lowering Intake Air Temperature: Cools the high-temperature air compressed by the turbocharger through air-to-air or air-to-water heat exchange, preventing damage to intake sensors. Increasing Air Density: The increased density of cooled air allows more oxygen to enter the cylinders, improving combustion efficiency., Manufacturer: DGOINGPI