Genuine OEM Audi Air Supercharger Radiator, part number 4E0145806F. This component, also known as an intercooler, cools the charge air compressed by the turbocharger or supercharger before it enters the engine. Cooler intake air is denser, allowing for more efficient combustion and increased power output. It is typically mounted at the front of the vehicle, behind the bumper. Constructed with high-efficiency cooling fins and durable end tanks. Genuine OEM intercoolers are designed with specific flow characteristics and thermal capacities to match the engine's requirements, ensuring optimal performance and longevity.