Arlen Ness Velocity Air Cleaner Kit Features: Features patented Big Sucker ″hidden breather″ technology and a forward facing 65° intake design that produces the highest air flow performance numbers (CFM) we have tested Ness hidden breathers are o-ringed at the heads and exit out the mouth of the injector/carb to provide efficient engine breathing, eliminating the need for any external hoses or hardware Integrated radius air inlet for performance gaining unobstructed airflow Milwaukee-Eight engine applications include a throttle servo cover Inverted 65 style filter features a built-in inverted top to pull in air not only from all sides of the filter but also the front, which directs more performance gaining airflow into your engine 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