Black anodized with a Contrast Cut machined finish. Forged billet aluminum construction. The clear polycarbonate window allows you to see straight into the throttle body of the running engine. Includes a pre-oiled black cotton air filter element; which is washable; for best filtration and the least restriction in air flow. The backing plate features a radiused air inlet and the Ness hidden breather backing plate technology for the cleanest look possible. Kits are complete and include all gaskets and hardware required for installation. Note: An optional rain sock / pre-filter is available as 590442.

Black anodized finish. Forged billet aluminum construction. The clear polycarbonate window allows you to see straight into the throttle body of the running engine. Includes a pre-oiled black cotton air filter element; which is washable; for best filtration and the least restriction in air flow. The backing plate features a radiused air inlet and Ness hidden breather backing plate technology for the cleanest look possible. Kits are complete and include all gaskets and hardware required for installation. Note: An optional rain sock / pre-filter is available as 590442.

Chrome plated. Forged billet aluminum construction. The clear polycarbonate window allows you to see straight into the throttle body of the running engine. Includes a pre-oiled black cotton air filter element; which is washable; for best filtration and the least restriction in air flow. The backing plate features a radiused air inlet and the Ness hidden breather backing plate technology for the cleanest look possible. Kits are complete and include all gaskets and hardware required for installation. Note: An optional rain sock / pre-filter is available as 590442.

It greatly helps; when trying to maximize airflow through a filter; to have a large filtering area. This is where the Arlen Ness design artists started. But building a huge filter was a no go; it had to be small and very effective. Adding the inside surface of the air cleaner to the outside adds a huge amount of filtering area. With the integrated radiused air inlet this air cleaner showed some of the highest flow numbers that Ness ever tested. The final looks give the 65ř air cleaners a very small custom and attractive velocity stack look that will effectively pull in the air from all sides. Filter elements are made from synthetic material. They resist water; a rain sock is usually not required. Filters are re-usable; just rinse clean and re-install. Oiling is not required. Note: Breather design is o-ringed at the heads; passes through the backing plate and is placed inside the mouth of the throttle body. This eliminates external breather hoses so nothing will be taken away from the clean look.

It greatly helps; when trying to maximize airflow through a filter; to have a large filtering area. But building a huge filter was a no go; it had to be small and very effective. This is where the Arlen Ness design artists started. Adding the inside surface of the air cleaner to the outside adds a huge amount of filtering area. With the integrated radiused air inlet this air cleaner showed some of the highest flow numbers that Ness ever tested. The final looks give the 65ř air cleaners a very small custom and attractive velocity stack look that will effectively pull in the air from all sides. Filter elements are made from synthetic material. They resist water; a rain sock is usually not required. Filters are re-usable; just rinse clean and re-install. Oiling is not required. Note: Breather design is o-ringed at the heads; passes through the backing plate and is placed inside the mouth of the throttle body. This eliminates external breather hoses so nothing will be taken away from the clean look.

- Black anodized backing plate - For use with the OEM oval 2-bolt air cleaner cover - Stage 1 red pre-oiled filter element. The best and simplest performance air cleaner kit for your bike... period. Gain up to 21% horsepower by simply installing a Big SuckerT kit on your intake. Backing plates: The Big Sucker aluminum backing plates feature a radiused inlet to optimize airflow for both carburetor and fuel injection applications. The built-in breathing system features hidden channels to prevent the use of unsightly exposed breather hoses and fittings. Note: See 958900 for the replacement filter element only.