Genuine OEM Volkswagen Exhaust Manifold Turbocharger, part number 03N145713L. This component combines the exhaust manifold and turbocharger to increase engine power and efficiency by forcing more air into the combustion chamber. It integrates the exhaust gas collection with the turbocharger's turbine housing. The precise casting and material composition are critical for heat resistance and durability. Genuine OEM parts ensure the correct fit and performance characteristics for this integrated unit.