With Scalloped Chrome billet cover. The exposed air filter element gives it good looks and excellent breathing capabilities. - This air cleaner assembly comes with Ness'' synthetic; stainless steel jacketed filter element equipped with synthetic filter media. This high performance filter is water-resistant and does not require filter oil. To service; just clean; rinse and re-install. - Replacement air filter elements 959594 (black synthetic filter; requires no oil) / 959598 (4-layer cotton gauge pre-oiled) - Optional rain sock 595629

- Black anodized one-piece billet aluminum backing plate - Used with Ness Stage II outer covers; or any custom outer cover with a single central bolt and a minimum of 8" diameter - Not compatible with OEM outer air cleaner covers - Stage II Big Suckers feature a 20% larger filtration area than the Stage I kits - Comes with a high performance synthetic filter with a zinc plated housing - Filter requires no oil; just clean; rinse and re-install when servicing - Increases horsepower & torque - Built-in patented breathing system features hidden channels to prevent the use of unsightly exposed breather hoses and fittings - Radius air inlet for unobstructed airflow. Note: See 959659 for the replacement Ness filter element.

- Black anodized one-piece billet aluminum backing plate - Used with Ness Stage II outer covers; or any custom outer cover with a single central bolt and a minimum of 8" diameter - Not compatible with OEM outer air cleaner covers - Stage II Big Suckers feature a 20% larger filtration area than the Stage I kits - Comes with a high performance synthetic filter with a zinc plated housing - Filter requires no oil; just clean; rinse and re-install when servicing - Increases horsepower & torque - Built-in patented breathing system features hidden channels to prevent the use of unsightly exposed breather hoses and fittings - Radius air inlet for unobstructed airflow. Note: See 959660 for the replacement Ness filter element.

- Chrome one-piece billet aluminum backing plate - Smooth chrome steel outer cover - Not compatible with OEM outer air cleaner covers - Stage II Big Suckers feature a 20% larger filtration area than the Stage I kits - Comes with a high performance synthetic filter with a zinc plated housing - Filter requires no oil; just clean; rinse and re-install when servicing - Increases horsepower & torque - Built-in patented breathing system features hidden channels to prevent the use of unsightly exposed breather hoses and fittings - Radius air inlet for unobstructed airflow.

- Black anodized one-piece billet aluminum backing plate - Smooth black powder coated steel outer cover - Not compatible with OEM outer air cleaner covers - Stage II Big Suckers feature a 20% larger filtration area than the Stage I kits - Comes with a high performance synthetic filter with a zinc plated housing - Filter requires no oil; just clean; rinse and re-install when servicing - Increases horsepower & torque - Built-in patented breathing system features hidden channels to prevent the use of unsightly exposed breather hoses and fittings - Radius air inlet for unobstructed airflow.

- Black anodized billet backing plate - Without end cover - Takes any 5-hole Twin Cam derby cover as end cover This ''Derby-Sucker'' will take any stock or custom Twin Cam 5-hole derby cover as outer cover; giving styling virtually endless options. The best and simplest performance air cleaner kit for your bike... period. Gain up to 21% horsepower by simply installing a Derby SuckerT kit on your intake. The Derby Sucker aluminum one-piece backing plate features a radiused inlet to optimize airflow. The built-in breathing system features hidden channels to prevent the use of unsightly exposed breather hoses and fittings. Note: See 959805 for the replacement air filter element. Note: An optional rain sock is not available for Derby Sucker air cleaner kits.

- Black anodized billet aluminum backing plate - Without end cover - Takes any 5-hole Twin Cam derby cover as end cover. This ''Derby-Sucker'' will take any stock or custom Twin Cam 5-hole derby cover as outer cover; giving styling virtually endless options. The best and simplest performance air cleaner kit for your bike... period. Gain up to 21% horsepower by simply installing a Derby SuckerT kit on your intake. The Derby Sucker aluminum one-piece backing plate features a radiused inlet to optimize airflow. The built-in breathing system features hidden channels to prevent the use of unsightly exposed breather hoses and fittings. Note: See 959805 for the replacement air filter element. Note: An optional rain sock is not available for Derby Sucker air cleaner kits.

- Black anodized with a Contrast Cut machined finish - Inverted top plate with pleated side to maximize airflow - Black synthetic high performance air filter element with built-in velocity stack - To service; just clean and rinse filter element - Do not oil filter element - Offers increased leg room - Complete with installation hardware and gaskets. Note: See 590442 for optional rain sock. See 960388 for the replacement air filter element

- Black anodized with a Contrast Cut machined finish - Inverted top plate with pleated side to maximize airflow - Black synthetic high performance air filter element with built-in velocity stack - To service; just clean and rinse filter element - Do not oil filter element - Offers increased leg room - Complete with installation hardware and gaskets. Note: See 590442 for optional rain sock. See 960388 for the replacement air filter element

- Inverted top plate with pleated side to maximize airflow - Black synthetic high performance air filter element with built-in velocity stack - To service; just clean and rinse filter element - Do not oil filter element - Offers increased leg room - Complete with installation hardware and gaskets. Note: See 590442 for optional rain sock. See 960388 for the replacement air filter element