ARLEN NESS BIG SUCKER STAGE 1 AIR CLEANER - BLACK - SYNTHETIC FILTER - '91-up XL SPORTSTER - 50-574

Big Sucker® Stage 1 air cleaners are engineered and proven to give your engine maximum airflow for more horsepower & torque. The patented hidden breather backing plate is o-ringed at the heads and exits inside the mouth of the throttle body for a virtually closed loop system, eliminating the need for any external hoses or hardware

• Increases Horsepower & Torque 
• Patented Hidden Breather Technology 
• Pre-Oiled & Synthetic High Performance Filters
• One-Piece Aluminum Backing Plate 
• Radius Air Inlet for Unobstructed Airflow  

PERFORMANCE AIR FILTER:

• Each Big Sucker® performance filter is handmade in the USA 
• Performance filters are available in red pre-oiled cotton or synthetic elements
• Red pre-oiled cotton performance filters are made from 4 layers of surgical grade cotton.  Filters are washable/re-useable, filter service kits are available separately
• Synthetics performance filters are made from a black synthetic filter element that is wrapped in a stainless steel jacket. Synthetic filters are water resistant and do not require oil, they are also washable/re-useable 

AIR CLEANER COVERS AND COMPONENTS:

• 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) 
  
  NOTE: Accepts Arlen Ness® Stage 1 Custom Covers.
  
  NOTE: Accepts most factory single-bolt air cleaner covers (check for proper fitment, factory cover specific fitment air cleaner kits are available).
  
  NOTE: Will fit '88-'90 models also; breather system is not applicable for these model years.
  

Specs