Description
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’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.
- Designed to increase horsepower & torque
- Dyno-tuned velocity stack
- Washable and reusable
- Excellent air filtration
Application Summary:
| Year | Make/Model |
|---|---|
| 1999-2007 | Harley-Davidson FLHR Road King |
| 2007 | Harley-Davidson FLHRC Road King Classic |
| 2002-2006 | Harley-Davidson FLHRCI Road King Classic |
| 2003-2006 | Harley-Davidson FLHRI Road King |
| 2004-2007 | Harley-Davidson FLHRS Road King Custom |
| 2004-2006 | Harley-Davidson FLHRSI Road King Custom |
| 1999-2007 | Harley-Davidson FLHT Electra Glide Standard |
| 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 |
| 2003-2006 | Harley-Davidson FLHTI Electra Glide Standard |
| 2006-2007 | Harley-Davidson FLHX Street Glide |
| 2006 | Harley-Davidson FLHXI Street Glide |
| 2006 | Harley-Davidson FLST Heritage Softail |
| 2000-2012 | Harley-Davidson FLSTC Heritage Softail Classic |
| 2002-2006 | Harley-Davidson FLSTCI Heritage Softail Classic |
| 2000-2012 | Harley-Davidson FLSTF Fat Boy |
| 2010-2012 | Harley-Davidson FLSTFB Fat Boy Lo |
| 2001-2006 | Harley-Davidson FLSTFI Fat Boy |
| 2006 | Harley-Davidson FLSTI Heritage Softail |
| 2005-2012 | Harley-Davidson FLSTN Softail Deluxe |
| 2005-2006 | Harley-Davidson FLSTNI Softail Deluxe |
| 2000-2003 | Harley-Davidson FLSTS Heritage Springer |
| 2005-2007 | Harley-Davidson FLSTSC Softail Springer Classic |
| 2005-2006 | Harley-Davidson FLSTSCI Softail Springer Classic |
| 2001-2003 | Harley-Davidson FLSTSI Heritage Springer |
| 1999-2002 | Harley-Davidson FLTR Road Glide |
| 2007 | Harley-Davidson FLTR Road Glide |
| 2002-2006 | Harley-Davidson FLTRI Road Glide |
| 2008-2009 | Harley-Davidson FXCW Rocker |
| 2008-2011 | Harley-Davidson FXCWC Rocker C |
| 1999-2007 | Harley-Davidson FXD Dyna Super Glide |
| 2007 | Harley-Davidson FXDB Street Bob |
| 2006 | Harley-Davidson FXDBI Street Bob |
| 2005 | Harley-Davidson FXDC Super Glide Custom |
| 2007 | Harley-Davidson FXDC Super Glide Custom |
| 2005-2006 | Harley-Davidson FXDCI Super Glide Custom |
| 2004-2006 | Harley-Davidson FXDI Dyna Super Glide |
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