Arlen Ness Stage 1 "Big Sucker" Air Filter Kit '08-'11 #18-512
Product Description

• Gain up to 12% more Horsepower by simply installing a Big Sucker™ on your bike!
• These kits are designed to be used with the stock air filter cover (except Sportster™ & 08-11 FXD)
• Sportster™ models require the purchase of a custom outer air cleaner
• These kits can be used as an exposed filter design when using one of our Stage 1 billet covers
NOTE: Image may or may not show backing plate with correct finish
NOTE: When tested on (08 FLHX) the Big-Sucker Stage 1 made a 19% horsepower increase