18-936 Arlen Ness Beveled Chrome Inverted Intake for 1988-2016 Harley Sportster XL Models Radius air inlet provides maximum performance by providing unobstructed airflow Features synthetic material that never needs oil, just wash and re-use for long lasting performance Features the patented Big Sucker hidden breather technology Machined from a single piece of forged billet aluminum for clean style, reduced weight, and improved ergonomics Features built in velocity stack that not only gives a unique look, but also increase performance by forcing air into the filters inverted pleated top