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K&N
Fits 1999 to 2012 Harley-Davidson FLHRCI Road King Classic, FLHRC Road King Classic, FLHRI Road King and 52 more models. See every vehicle
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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.
Warranty: No-Hassle Lifetime Limited warranty
| Year | Make | Model |
|---|---|---|
| 2002 - 2006 | Harley-Davidson | FLHRCI Road King Classic |
| 2007 | Harley-Davidson | FLHRC Road King Classic |
| 2003 - 2006 | Harley-Davidson | FLHRI Road King |
| 1999 - 2007 | Harley-Davidson | FLHR Road King |
| 2004 - 2006 | Harley-Davidson | FLHRSI Road King Custom |
| 2004 - 2007 | Harley-Davidson | FLHRS Road King Custom |
| 1999 - 2005 | Harley-Davidson | FLHTC Electra Glide Classic |
| 2007 | Harley-Davidson | FLHTC Electra Glide Classic |
| 2002 - 2006 | Harley-Davidson | FLHTCI Electra Glide Classic |
| 2007 | Harley-Davidson | FLHTCU Electra Glide Ultra Classic |
| 2002 - 2006 | Harley-Davidson | FLHTCUI Electra Glide Ultra Classic |
| 1999 - 2007 | Harley-Davidson | FLHT Electra Glide Standard |
| 2003 - 2006 | Harley-Davidson | FLHTI Electra Glide Standard |
| 2006 | Harley-Davidson | FLHXI Street Glide |
| 2006 - 2007 | Harley-Davidson | FLHX Street Glide |
| 2000 - 2012 | Harley-Davidson | FLSTC Heritage Softail Classic |
| 2002 - 2006 | Harley-Davidson | FLSTCI Heritage Softail Classic |
| 2010 - 2012 | Harley-Davidson | FLSTFB Fat Boy Lo |
| 2000 - 2012 | Harley-Davidson | FLSTF Fat Boy |
| 2001 - 2006 | Harley-Davidson | FLSTFI Fat Boy |
| 2006 | Harley-Davidson | FLST Heritage Softail |
| 2006 | Harley-Davidson | FLSTI Heritage Softail |
| 2005 - 2006 | Harley-Davidson | FLSTNI Softail Deluxe |
| 2005 - 2012 | Harley-Davidson | FLSTN Softail Deluxe |
| 2005 - 2006 | Harley-Davidson | FLSTSCI Softail Springer Classic |
| 2005 - 2007 | Harley-Davidson | FLSTSC Softail Springer Classic |
| 2000 - 2003 | Harley-Davidson | FLSTS Heritage Springer |
| 2001 - 2003 | Harley-Davidson | FLSTSI Heritage Springer |
| 2002 - 2006 | Harley-Davidson | FLTRI Road Glide |
| 1999 - 2002 | Harley-Davidson | FLTR Road Glide |
| 2007 | Harley-Davidson | FLTR Road Glide |
| 2008 - 2011 | Harley-Davidson | FXCWC Rocker C |
| 2008 - 2009 | Harley-Davidson | FXCW Rocker |
| 2006 | Harley-Davidson | FXDBI Street Bob |
| 2007 | Harley-Davidson | FXDB Street Bob |
| 2005 - 2006 | Harley-Davidson | FXDCI Super Glide Custom |
| 2005 | Harley-Davidson | FXDC Super Glide Custom |
| 2007 | Harley-Davidson | FXDC Super Glide Custom |
| 1999 - 2007 | Harley-Davidson | FXD Dyna Super Glide |
| 2006 | Harley-Davidson | FXDI35 Dyna 35th Anniversary Super Glide |
| 2004 - 2006 | Harley-Davidson | FXDI Dyna Super Glide |
| 1999 - 2005 | Harley-Davidson | FXDL Dyna Low Rider |
| 2007 | Harley-Davidson | FXDL Dyna Low Rider |
| 2004 - 2006 | Harley-Davidson | FXDLI Dyna Low Rider |
| 1999 - 2000 | Harley-Davidson | FXDS-Conv Dyna Convertible |
| 1999 - 2007 | Harley-Davidson | FXDWG Dyna Wide Glide |
| 2004 - 2006 | Harley-Davidson | FXDWGI Dyna Wide Glide |
| 1999 - 2004 | Harley-Davidson | FXDX Dyna Super Glide Sport |
| 2004 - 2005 | Harley-Davidson | FXDXI Dyna Super Glide Sport |
| 2001 - 2003 | Harley-Davidson | FXDXT Dyna Super Glide T-Sport |
| 2001 - 2006 | Harley-Davidson | FXSTBI Night Train |
| 2000 - 2009 | Harley-Davidson | FXSTB Night Train |
| 2007 - 2010 | Harley-Davidson | FXSTC Softail Custom |
| 2001 - 2006 | Harley-Davidson | FXSTDI Softail Deuce |
| 2000 - 2007 | Harley-Davidson | FXSTD Softail Deuce |
| 2001 - 2006 | Harley-Davidson | FXSTI Softail Standard |
| 2001 - 2006 | Harley-Davidson | FXSTSI Springer Softail |
| 2000 - 2009 | Harley-Davidson | FXST Softail Standard |
| 2000 - 2006 | Harley-Davidson | FXSTS Springer Softail |