Fit For C30 C70 S40 V50 2.4L 2.5L 30741956 Direct Fit Automatic Transmission Oil Cooler. OE Number: 90642; 30683022; 30723129; 30741956;. By significantly lowering the temperature of air compressed by the turbocharger, the intercooler increases its density, allowing more oxygen to enter the cylinders for combustion. 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