K&N performance High-Flow Air Filters are engineered to improve engine performance by increasing airflow up to 50%. Unlike disposable paper filters which must be frequently replaced K&N Air Filters are washable reusable and engineered to last for the life of your motorcycle ATV or Side-By-Side vehicle. K&N air filters are backed by our famous 10-Year/Million Mile Limited Warranty and they provide an environmentally friendly way to reduce landfill waste by avoiding disposable filters. Engineered to fit easily into your factory air box installation can be completed in a matter of minutes! K&N develops and tests each product on the world’s toughest race tracks so we can bring the highest level of performance for your journey. Join the millions of customers who have saved money and improved performance by upgrading to K&N filtration. Fitment Information: 2010-2014 HARLEY DAVIDSON FLTRX Road Glide Custom; 2008-2013 HARLEY DAVIDSON FLHR Road King; 2008-2013 HARLEY DAVIDSON FLHRC Road King Classic; 2008-2013 HARLEY DAVIDSON FLHTC Electra Glide Classic; 2008-2013 HARLEY DAVIDSON FLHTCU Ultra Classic Electra Glide; 2009-2013 HARLEY DAVIDSON FLHTCUTG Tri Glide Ultra Classic; 2010-2013 HARLEY DAVIDSON FLHTK Electra Glide Ultra Limited; 2008-2013 HARLEY DAVIDSON FLHX Street Glide; 2011-2013 HARLEY DAVIDSON FLTRU Road Glide Ultra; 2009-2012 HARLEY DAVIDSON FLHP Road King Police; 2012 HARLEY DAVIDSON FLHTCU Electra Glide Ultra Classic; 2009-2012 HARLEY DAVIDSON FLHTP Electra Glide Police; 2010-2011 HARLEY DAVIDSON FLHXXX Street Glide Trike; 2008-2010 HARLEY DAVIDSON FLHT Electra Glide Standard; 2010 HARLEY DAVIDSON FLHTCUSE5 CVO Ultra Classic Electra Glide; 2008-2010 HARLEY DAVIDSON FLTR Road Glide; 2009 HARLEY DAVIDSON FLHTCUSE4 CVO Ultra Classic Electra Glide; 2008 HARLEY DAVIDSON FLHRSE4 Screamin Eagle Road King; 2008 HARLEY DAVIDSON FLHTCUSE3 Screamin Eagle Ultra Classic Electra Gl