Arlen Ness AN-600-034 Velocity 90 Degree Air Cleaner Kit Black for Harley-Davidson Sportster 88-21Arlen Ness Velocity 90 Air Cleaner Kit For Harley Arlen Ness has created an aggressive forward facing 90 Velocity air cleaner that has been designed with a short tube length to significantly increase airflow without sacrificing legroom. Velocity style performance filter features a built in inverted top to pull in air not only from the sides of the filter but also the front, for more performance gaining airflow. Features: Aggressive short length intake