The aFe MagnumFLOW Air Filters OER PDS A/F PDS BMW X3 05-10 / Z4 06-08 L6-3.0L is a performance air filter designed specifically for the BMW X3 05-10 and Z4 06-08 L6-3.0L engines. It is constructed with a Pro Dry S media for maximum convenience. This filter utilizes aFe's progressive layering technology to provide maximum airflow and filtration. It also features a urethane frame for maximum strength and durability. The filter is washable and reusable for maximum convenience and cost savings.