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Availability: 1 in stock
SKU: RK-3909-1
Manufacturer: K&N Engineering
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$249.99

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.

The latest addition to K&N's RK Series was developed to get more horsepower from your Twin Cam Harley-Davidson engine. Provides a significant airflow increase to the engine without sacrificing filtration.

K&N Red Intake System for Harley Davidson

Kit d'admission directe Harley Davidson

Sistema de admisiĆ³n Harley Davidson

Intake System-Harley Davidson

Air Cleaner Assembly

Air 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.

The latest addition to K&N's RK Series was developed to get more horsepower from your Twin Cam Harley-Davidson engine. Provides a significant airflow increase to the engine without sacrificing filtration.

K&N Red Intake System for Harley Davidson

Kit d'admission directe Harley Davidson

Sistema de admisiĆ³n Harley Davidson

Intake System-Harley Davidson

Air Cleaner Assembly

Air Intake System

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Vehicle Fitment

Harley-Davidson

    FLSTC Heritage Softail Classic

      2012 Base - 2011 Base - 2010 Base - 2009 Base - 2008 Base - 2007 Base - 2006 Base - 2005 Base - 2004 Base - 2003 Base - 2002 Base - 2001 Base - 2000 Base

    FLSTF Fat Boy

      2012 Base - 2011 Base - 2010 Base - 2009 Base - 2008 Base - 2007 Base - 2006 Base - 2005 Base - 2004 Base - 2003 Base - 2002 Base - 2001 Base - 2000 Base

    FLSTFB Fat Boy Lo

      2012 Base - 2011 Base - 2010 Base

    FLSTN Softail Deluxe

      2012 Base - 2011 Base - 2010 Base - 2009 Base - 2008 Base - 2007 Base - 2006 Base - 2005 Base

    FLTRX Road Glide Custom

      2011 Base - 2010 Base

    FXCWC Rocker C

      2011 Base - 2010 Base - 2009 Base - 2008 Base

    FXSTC Softail Custom

      2010 Base - 2009 Base - 2008 Base - 2007 Base

    FXCW Rocker

      2009 Base - 2008 Base

    FXST Softail Standard

      2009 Base - 2008 Base - 2007 Base - 2006 Base - 2005 Base - 2004 Base - 2003 Base - 2002 Base - 2001 Base - 2000 Base

    FXSTB Night Train

      2009 Base - 2008 Base - 2007 Base - 2006 Base - 2005 Base - 2004 Base - 2003 Base - 2002 Base - 2001 Base - 2000 Base

    FLHR Road King

      2007 Base - 2006 Base - 2005 Base - 2004 Base - 2003 Base - 2002 Base - 2001 Base - 2000 Base - 1999 Base

    FLHRC Road King Classic

      2007 Base

    FLHRS Road King Custom

      2007 Base - 2006 Base - 2005 Base - 2004 Base

    FLHT Electra Glide Standard

      2007 Base - 2006 Base - 2005 Base - 2004 Base - 2003 Base - 2002 Base - 2001 Base - 2000 Base - 1999 Base

    FLHTC Electra Glide Classic

      2007 Base - 2005 Base - 2004 Base - 2003 Base - 2002 Base - 2001 Base - 2000 Base - 1999 Base

    FLHTCU Electra Glide Ultra Classic

      2007 Base

    FLHX Street Glide

      2007 Base - 2006 Base

    FLSTSC Softail Springer Classic

      2007 Base - 2006 Base - 2005 Base

    FLTR Road Glide

      2007 Base - 2002 Base - 2001 Base - 2000 Base - 1999 Base

    FXD Dyna Super Glide

      2007 Base - 2006 Base - 2005 Base - 2004 Base - 2003 Base - 2002 Base - 2001 Base - 2000 Base - 1999 Base

    FXDB Street Bob

      2007 Base

    FXDC Super Glide Custom

      2007 Base - 2005 Base

    FXDL Dyna Low Rider

      2007 Base - 2005 Base - 2004 Base - 2003 Base - 2002 Base - 2001 Base - 2000 Base - 1999 Base

    FXDWG Dyna Wide Glide

      2007 Base - 2006 Base - 2005 Base - 2004 Base - 2003 Base - 2002 Base - 2001 Base - 2000 Base - 1999 Base

    FXSTD Softail Deuce

      2007 Base - 2006 Base - 2005 Base - 2004 Base - 2003 Base - 2002 Base - 2001 Base - 2000 Base

    FLHRCI Road King Classic

      2006 Base - 2005 Base - 2004 Base - 2003 Base - 2002 Base

    FLHRI Road King

      2006 Base - 2005 Base - 2004 Base - 2003 Base

    FLHRSI Road King Custom

      2006 Base - 2005 Base - 2004 Base

    FLHTCI Electra Glide Classic

      2006 Base - 2005 Base - 2004 Base - 2003 Base - 2002 Base

    FLHTCUI Electra Glide Ultra Classic

      2006 Base - 2005 Base - 2004 Base - 2003 Base - 2002 Base

    FLHTI Electra Glide Standard

      2006 Base - 2005 Base - 2004 Base - 2003 Base

    FLHXI Street Glide

      2006 Base

    FLST Heritage Softail

      2006 Base

    FLSTCI Heritage Softail Classic

      2006 Base - 2005 Base - 2004 Base - 2003 Base - 2002 Base

    FLSTFI Fat Boy

      2006 Base - 2005 Base - 2004 Base - 2003 Base - 2002 Base - 2001 Base

    FLSTI Heritage Softail

      2006 Base

    FLSTNI Softail Deluxe

      2006 Base - 2005 Base

    FLSTSCI Softail Springer Classic

      2006 Base - 2005 Base

    FLTRI Road Glide

      2006 Base - 2005 Base - 2004 Base - 2003 Base - 2002 Base

    FXDBI Street Bob

      2006 Base

    FXDCI Super Glide Custom

      2006 Base - 2005 Base

    FXDI Dyna Super Glide

      2006 Base - 2005 Base - 2004 Base

    FXDI35 Dyna 35th Anniversary Super Glide

      2006 Base

    FXDLI Dyna Low Rider

      2006 Base - 2005 Base - 2004 Base

    FXDWGI Dyna Wide Glide

      2006 Base - 2005 Base - 2004 Base

    FXSTBI Night Train

      2006 Base - 2005 Base - 2004 Base - 2003 Base - 2002 Base - 2001 Base

    FXSTDI Softail Deuce

      2006 Base - 2005 Base - 2004 Base - 2003 Base - 2002 Base - 2001 Base

    FXSTI Softail Standard

      2006 Base - 2005 Base - 2004 Base - 2003 Base - 2002 Base - 2001 Base

    FXSTS Springer Softail

      2006 Base - 2005 Base - 2004 Base - 2003 Base - 2002 Base - 2001 Base - 2000 Base

    FXSTSI Springer Softail

      2006 Base - 2005 Base - 2004 Base - 2003 Base - 2002 Base - 2001 Base

    FXDXI Dyna Super Glide Sport

      2005 Base - 2004 Base

    FXDX Dyna Super Glide Sport

      2004 Base - 2003 Base - 2002 Base - 2001 Base - 2000 Base - 1999 Base

    FLSTS Heritage Springer

      2003 Base - 2002 Base - 2001 Base - 2000 Base

    FLSTSI Heritage Springer

      2003 Base - 2002 Base - 2001 Base

    FXDXT Dyna Super Glide T-Sport

      2003 Base - 2002 Base - 2001 Base

    FXDS-Conv Dyna Convertible

      2000 Base - 1999 Base
*we take fitment seriously and have invested heavily into matching products to your vehicle, but it is up to the end user to confirm products are suitable for their vehicle, legal for them to use for the purposes they intend, and verify fitment upon installation. Many opened products may not be returned, so if fitment is in question, please contact us before ordering. We are not resonsible for any costs incurring from a product not being suitable to an end users application.