Monster Sucker? Air Cleaner - Black Hidden breather technology for a reliable intake that enhances the performance of the engine, Hidden breathers are O-ringed at the heads and exits out the mouth of the throttle body to provide efficient engine breathing, eliminating the need for any external hoses or hardware, Filter is constructed from synthetic material that is water-resistant, which in most cases eliminate the need for a rain sock, Filters are reusable and do not require oil, just rinse and reuse, Filter features a built-in inverted top to pull in air from all sides resulting in more performance-gaining airflow