Genuine OEM Audi Rear Lower Bumper Diffuser, part number 8V5807521H1RR. This aerodynamic component is designed to manage airflow under the vehicle, reducing drag and improving stability at speed. It is positioned on the lower rear section of the bumper. Weighing 1.807 kg and measuring 1.45 meters in length, this diffuser features a 1RR finish. Genuine OEM diffusers ensure exact mounting points, factory-matched contours, and durable materials for optimal aerodynamic performance and aesthetic integration.