Filter features a built-in inverted top to pull in air not only from all sides of the filter but also from the front, which results in more performance-gaining airflow. Each filter is constructed from synthetic material that is water-resistant, which in most cases eliminates the need for a rain sock. Filters are re-usable and do not require oil; just rinse and re-use. The item "Arlen Ness Sportster Black Monster Sucker Air Cleaner 1991-2019 Harley Models" is in sale since Wednesday, February 22, 2017.This item is in the category "eBay Motors\Parts & Accessories\Motorcycle Parts\Air Intake & Fuel Delivery\Air Filters". The seller is "getlowered" and is located in Warminster, Pennsylvania. This item can be shipped worldwide.