# K&N Oval Red 9in Intake System for Harley-Davidson K&N's RK Series was developed to get more horsepower from your Twin Cam Harley-Davidson engine. Built around the legendary K&N High-Flow Air Filter, the this RK Series assembly includes an innovative powder coated billet aluminum back plate that eliminates external breathers and features a built-in, dyno-tuned velocity stack. The result is a significant airflow increase to the engine without sacrificing filtration. This RK Series assembly retains a factory appearance by utilizing the stock air cleaner cover. The RK-3910-1 comes with a larger air filter and longer spacers than the RK-3909-1. - Excellent air filtration - Large Capacity 2-1/4" This Part Fits: Year Make Model Submodel 1999-2017 Harley-Davidson FLHR Road King Base 2007-2013 Harley-Davidson FLHRC Road King Classic Base 2002-2006 Harley-Davidson FLHRCI Road King Classic Base 2003-2006 Harley-Davidson FLHRI Road King Base 2004-2007 Harley-Davidson FLHRS Road King Custom Base 2004-2006 Harley-Davidson FLHRSI Road King Custom Base 1999-2009 Harley-Davidson FLHT Electra Glide Standard Base 1999-2005,2007-2013 Harley-Davidson FLHTC Electra Glide Classic Base 2002-2006 Harley-Davidson FLHTCI Electra Glide Classic Base 2007-2017 Harley-Davidson FLHTCU Electra Glide Ultra Classic Base 2002-2006 Harley-Davidson FLHTCUI Electra Glide Ultra Classic Base 2009-2013 Harley-Davidson FLHTCUTG Tri Glide Ultra Classic Base 2003-2006 Harley-Davidson FLHTI Electra Glide Standard Base 2015-2017 Harley-Davidson FLHTKL Ultra Limited Low Base 2014-2017 Harley-Davidson FLHTKSE CVO Limited Base 2006-2017 Harley-Davidson FLHX Street Glide Base 2006 Harley-Davidson FLHXI Street Glide Base 2014-2017 Harley-Davidson FLHXS Street Glide Special Base 2010,2015-2017 Harley-Davidson FLHXSE CVO Street Glide Base 2010-2011 Harley-Davidson FLHXXX Street Glide Trike Base 2006 Harley-Davidson FLST Heritage Softail Base 1999-2017 Harley-Davidson FLSTC Heritage Softail Classic Base 2001-2006 Harley-Davidson FLSTCI Heritage Softail Classic Base 1999-2017 Harley-Davidson FLSTF Fat Boy Base 2010-2017 Harley-Davidson FLSTFB Fat Boy Lo Base 2001-2006 Harley-Davidson FLSTFI Fat Boy Base 2006 Harley-Davidson FLSTI Heritage Softail Base 2005-2012 Harley-Davidson FLSTN Softail Deluxe Base 2005-2006 Harley-Davidson FLSTNI Softail Deluxe Base 2000-2003 Harley-Davidson FLSTS Heritage Springer Base 2008-2011 Harley-Davidson FLSTSB Cross Bones Base 2005-2007 Harley-Davidson FLSTSC Softail Springer Classic Base 2005-2006 Harley-Davidson FLSTSCI Softail Springer Classic Base 2010 Harley-Davidson FLSTSE CVO Softail Convertible Base 2001-2003 Harley-Davidson FLSTSI Heritage Springer Base 1999-2010,2016 Harley-Davidson FLTR Road Glide Base 2002-2006 Harley-Davidson FLTRI Road Glide Base 2011-2013,2016-2017 Harley-Davidson FLTRU Road Glide Ultra Base 2011,2015-2016 Harley-Davidson FLTRUSE CVO Road Glide Ultra Base 2010-2013 Harley-Davidson FLTRX Road Glide Custom Base 2015-2017 Harley-Davidson FLTRXS Road Glide Special Base 2012 Harley-Davidson FLTRXSE CVO Road Glide Custom Base 2008-2009 Harley-Davidson FXCW Rocker Base 2008-2011 Harley-Davidson FXCWC Rocker C Base 1999-2010 Harley-Davidson FXD Dyna Super Glide Base 2007 Harley-Davidson FXDB Street Bob Base 2006 Harley-Davidson FXDBI Street Bob Base 2005,2007 Harley-Davidson FXDC Super Glide Custom Base 2005-2006 Harley-Davidson FXDCI Super Glide Custom Base 2004-2006 Harley-Davidson FXDI Dyna Super Glide Base 2006 Harley-Davidson FXDI35 Dyna 35th Anniversary Super Glide Base 1999-2005,2007-2009,2014-2017 Harley-Davidson FXDL Dyna Low Rider Base 2004-2006 Harley-Davidson FXDLI Dyna Low Rider Base 1999-2000 Harley-Davidson FXDS-Conv Dyna Convertible Base 1999-2008,2010-2017 Harley-Davidson FXDWG Dyna Wide Glide Base 2004-2006 Harley-Davidson FXDWGI Dyna Wide Glide Base 1999-2005 Harley-Davidson FXDX Dyna Super Glide Sport Base 2004-2005 Harley-Davidson FXDXI Dyna Super Glide Sport Base 2001-2003 Harley-Davidson FXDXT Dyna Super Glide T-Sport Base 2000-2009 Harley-Davidson FXST Softail Standard Base 1999-2009 Harley-Davidson FXSTB Night Train Base 2001-2006 Harley-Davidson FXSTBI Night Train Base 1999,2007-2010 Harley-Davidson FXSTC Softail Custom Base 2000-2007 Harley-Davidson FXSTD Softail Deuce Base 2001-2006 Harley-Davidson FXSTDI Softail Deuce Base 2003-2004 Harley-Davidson FXSTDSE Screamin Eagle Softail Deuce Base 2001-2006 Harley-Davidson FXSTI Softail Standard Base 1999-2006 Harley-Davidson FXSTS Springer Softail Base 2001-2006 Harley-Davidson FXSTSI Springer Softail Base 2007 Harley-Davidson FXSTSSE Screamin Eagle Softail Springer Base 2009 Harley-Davidson FXSTSSE3 CVO Softail Springer Base ## Details - **Price:** 388.42 CAD - **Vendor:** K&N Engineering - **Type:** Cold Air Intakes ## Variants | Variant | Price | Available | |---------|-------|-----------| | Default Title | 388.42 CAD | In stock | ## Images - Photo - Primary - Photo - Primary - Photo - Primary - Photo - Primary - Logo Image --- > Source: [Standard Auto Part](https://www.standardautopart.com/products/k-n-oval-red-9in-intake-system-for-harley-davidson) > Updated: 2026-06-27