Genuine OEM Audi Air Supercharger Radiator, part number 8J0145803. This component, also known as an intercooler, is responsible for cooling the compressed air from the turbocharger before it enters the engine, improving performance and efficiency. It is located in the engine's intake system. The radiator features specific fin density and flow paths for optimal heat exchange. Genuine OEM parts ensure the precise fit and thermal performance required for turbocharged engines.