BBK Air Filters provide excellent protection without reducing the airflow. As a result, your engine will receive dense, cool air that is rich of oxygen. At the same time, any debris will not be allowed to enter your engine and cause any troubles. BBK Air Filters are made of highest quality cotton and are 75% more effective in comparison with the paper filters. Plus, BBK Air Filters are washable and are compatible with both BBK cold-air systems and custom applications.