Arlen Ness, Stage 1 Big Sucker air cleaner kit. OEM cover

Ness Stage 1 Big Sucker air filter kit

The best and simplest performance air cleaner kit for your bike... period. Gain up to 21% horsepower by simply installing a Big Sucker™ 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. For use with OEM round air cleaner cover. - Standard Red Pre-Oiled filter. - Black backing plate.

Fits: > 88-20 XL (excl. Forty Eight, Seventy Two, Iron); 88-15 FX. (with oval cover)