Review on Arlen Ness 18-324 Big Sucker Stage I Air Filter Kit with included Cover by Robert Maysey

Definitely one of the coolest aesthetic modifications I've done to my 2003 1200 Sportster. I also felt a difference in performance right after installation. Others have mentioned the need to reload carbs, but my bike sounds good. I'll check the spark plugs to be sure. Installation was too easy as the filter mount is pretty basic. I had no problems as everything was perfectly aligned. Depending on how much of a perfectionist you are, this kit isn't exactly perfect. There will be a small concave crater on the plate that attaches to the air cleaner once you start tightening the screw properly. However, that doesn't bother me. Overall, I highly recommend this product for any fitness level.