Arlen Ness, Stage 1 Big Sucker air cleaner kit. OEM cover 16-22 XL Forty Eight Seventy Two Iron. With OEM round air cleaner cove

- Plain backing plate - For use with the OEM round 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. 16-22 XL Forty Eight Seventy Two Iron. With OEM round air cleaner cover (NU)