Guaranteed increase in horsepower. Developed around an over-sized K&N high-flow air filter that is designed to boost performance, filtration and service intervals. Aluminum backing plate with an integrated breather system and velocity stack provides a solid mounting surface. Made in the U.S.A.. NOTE: Not legal for sale or use on any pollution controlled motor vehicle..


Harley Davidson FLHR Road King 2008-2016
Harley Davidson FLHRC Road King Classic 2008-2013
Harley Davidson FLHT Electra Glide Standard 2008-2009
Harley Davidson FLHTC Electra Glide Classic 2008-2013
Harley Davidson FLHTCU Electra Glide Ultra Classic 2008-2016
Harley Davidson FLHTCUL Electra Glide Ultra Classic Low 2015-2016
Harley Davidson FLHTCUTG Tri Glide Ultra 2014-2015
Harley Davidson FLHTCUTG Tri Glide Ultra Classic 2009-2013
Harley Davidson FLHTK Electra Glide Ultra Limited 2010-2014
Harley Davidson FLHTK Ultra Limited 2015-2016
Harley Davidson FLHTKL Ultra Limited Low 2015-2016
Harley Davidson FLHX Street Glide 2008-2016
Harley Davidson FLHXS Street Glide Special 2014-2016
Harley Davidson FLHXXX Street Glide Trike 2010-2011
Harley Davidson FLRT Freewheeler 2015-2016
Harley Davidson FLS Softail Slim 2016-2017
Harley Davidson FLSS Softail Slim S 2016-2017
Harley Davidson FLSTC Heritage Softail Classic 2016-2017
Harley Davidson FLSTF Fat Boy 2016-2017
Harley Davidson FLSTFB Fat Boy Lo 2016
Harley Davidson FLSTFBS Fat Boy S 2016-2017
Harley Davidson FLSTN Softail Deluxe 2016-2017
Harley Davidson FLTRU Road Glide Ultra 2011-2013
Harley Davidson FLTRX Road Glide 2015-2016
Harley Davidson FLTRX Road Glide Custom 2010-2013
Harley Davidson FLTRXS Road Glide Special 2015-2016
Harley Davidson FXSB Breakout 2016-2017

Warning: Cancer and Reproductive Harm – www.P65Warnings.ca.gov

Manufacturer's Part Number	RK-3937
CARB Approved	Yes