Stage 1 Big Sucker air cleaner kit. OEM cover

Plain finish one-piece aluminum backing plate. - Used with OEM air cleaner cover with single central bolt (excl. 08-17 Dyna, see note). - Can be used as an exposed filter design when using one of the Ness Stage1 billet covers - 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: 08-17 Dyna will require a custom outer air cleaner cover with a minimum inner diameter of 6-1/4".