K&N Filters RK-3909-1 Motorcycle Intake System

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 backplate 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.This part fits the following models:HARLEY DAVIDSON FLHR Road King 88 CI (1999 - 2006)HARLEY DAVIDSON FLHR Road King 96 CI (2007 - 2007)HARLEY DAVIDSON FLHRC Road King Classic 96 CI (2007 - 2007)HARLEY DAVIDSON FLHRCI Road King Classic F/I 88 CI (2002 - 2006)HARLEY DAVIDSON FLHRI Road King F/I 88 CI (2003 - 2006)HARLEY DAVIDSON FLHRS Road King Custom 88 CI (2004 - 2006)HARLEY DAVIDSON FLHRS Road King Custom 96 CI (2007 - 2007)HARLEY DAVIDSON FLHRSI Road King Custom F/I 88 CI (2004 - 2006)HARLEY DAVIDSON FLHT Electra Glide Standard 88 CI (1999 - 2006)HARLEY DAVIDSON FLHT Electra Glide Standard 96 CI (2007 - 2007)HARLEY DAVIDSON FLHTC Electra Glide Classic 88 CI (1999 - 2005)HARLEY DAVIDSON FLHTC Electra Glide Classic 96 CI (2007 - 2007)HARLEY DAVIDSON FLHTCI Electra Glide Classic F/I 88 CI (2002 - 2006)HARLEY DAVIDSON FLHTCU Ultra Classic Electra Glide 96 CI (2007 - 2007)HARLEY DAVIDSON FLHTCUI Electra Glide Ultra Classic F/I 88 CI (2002 - 2006)HARLEY DAVIDSON FLHTI Electra Glide Standard F/I 88 CI (2003 - 2006)HARLEY DAVIDSON FLHX Street Glide 88 CI (2006 - 2006)HARLEY DAVIDSON FLHX Street Glide 96 CI (2007 - 2007)HARLEY DAVIDSON FLHXI Street Glide F/I 88 CI (2006 - 2006)HARLEY DAVIDSON FLST Heritage Softail 88 CI (2006 - 2006)HARLEY DAVIDSON FLSTC Heritage Softail Classic 103 CI (2012 - 2012)HARLEY DAVIDSON FLSTC Heritage Softail Classic 88 CI (2000 - 2006)HARLEY DAVIDSON FLSTC Heritage Softail Classic 96 CI (2007 - 2011)HARLEY DAVIDSON FLSTCI Heritage Softail Classic F/I 88 CI (2002 - 2006)HARLEY DAVIDSON FLSTF Fat Boy 103 CI (2012 - 2012)HARLEY DAVIDSON FLSTF Fat Boy 88 CI (2000 - 2006)HARLEY DAVIDSON FLSTF Fat Boy 96 CI (2007 - 2011)HARLEY DAVIDSON FLSTFB Softail Fat Boy Lo 103 CI (2012 - 2012)HARLEY DAVIDSON FLSTFB Softail Fat Boy Lo 96 CI (2010 - 2011)HARLEY DAVIDSON FLSTFI Fat Boy F/I 88 CI (2001 - 2006)HARLEY DAVIDSON FLSTI Heritage Softail F/I 88 CI (2006 - 2006)HARLEY DAVIDSON FLSTN Softail Deluxe 103 CI (2012 - 2012)HARLEY DAVIDSON FLSTN Softail Deluxe 88 CI (2005 - 2006)HARLEY DAVIDSON FLSTN Softail Deluxe 96 CI (2007 - 2011)HARLEY DAVIDSON FLSTNI Softail Deluxe F/I 88 CI (2005 - 2006)HARLEY DAVIDSON FLSTS Heritage Springer 88 CI (2000 - 2003)HARLEY DAVIDSON FLSTSC Softail Springer Classic 88 CI (2005 - 2006)HARLEY DAVIDSON FLSTSC Softail Springer Classic 96 CI (2007 - 2007)HARLEY DAVIDSON FLSTSCI Softail Springer Classic F/I 88 CI (2005 - 2006)HARLEY DAVIDSON FLSTSI Heritage Springer F/I 88 CI (2001 - 2003)HARLEY DAVIDSON FLTR Road Glide 88 CI (1999 - 2002)HARLEY DAVIDSON FLTR Road Glide 96 CI (2007 - 2007)HARLEY DAVIDSON FLTRI Road Glide F/I 88 CI (2002 - 2006)HARLEY DAVIDSON FXCW Rocker 96 CI (2008 - 2009)HARLEY DAVIDSON FXCWC Rocker C 96 CI (2008 - 2011)HARLEY DAVIDSON FXD Dyna Super Glide 88 CI (1999 - 2006)HARLEY DAVIDSON FXD Dyna Super Glide 96 CI (2007 - 2007)HARLEY DAVIDSON FXDB Street Bob 96 CI (2007 - 2007)HARLEY DAVIDSON FXDBI Street Bob F/I 88 CI (2006 - 2006)HARLEY DAVIDSON FXDC Dyna Super Glide Custom 88 CI (2005 - 2006)HARLEY DAVIDSON FXDC Super Glide Custom 96 CI (2007 - 2007)HARLEY DAVIDSON FXDCI Dyna Super Glide Custom F/I 88 CI (2005 - 2006)HARLEY DAVIDSON FXDI Dyna Super Glide F/I 88 CI (2004 - 2006)HARLEY DAVIDSON FXDI35 35th Anniv. Super Glide F/I 88 CI (2006 - 2006)HARLEY DAVIDSON FXDL Dyna Low Rider 88 CI (1999 - 2005)HARLEY DAVIDSON FXDL Dyna Low Rider 96 CI (2007 - 2007)HARLEY DAVIDSON FXDLI Dyna Low Rid