Arlen Ness Black Stage 1 Big Sucker Air Cleaner Filter fits 88-21 Sportster XL

• Each hidden breather is o-ringed at the heads and exits at the mouth of the injector/carb to provide efficient engine breathing, eliminating the need for any external hoses or hardware
• Radius air inlet provides maximum performance by providing unobstructed airflow
• One-piece aluminum backing plate features hidden breather technology
• All necessary hardware and instructions are included

Will fit '88-'90 models also; breather system is not applicable for these model years.

Accepts Arlen Ness® Stage 1 Custom Covers.

Accepts most factory single-bolt air cleaner covers (check for proper fitment, factory cover specific fitment air cleaner kits are available).