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Enhance horsepower and airflow for Harley Davidson motorcycles with advanced filtration.
The K&N Air Cleaner Assembly RK Series is engineered to optimize horsepower for Twin Cam Harley-Davidson engines. This assembly features a high-flow air filter that significantly increases airflow while maintaining superior filtration capabilities. The innovative design includes a powder coated billet aluminum backplate that eliminates the need for external breathers, ensuring a clean and streamlined installation.
Incorporating a built-in, dyno-tuned velocity stack, this air cleaner assembly enhances engine performance without compromising on aesthetics. It retains a factory appearance by utilizing the stock air cleaner cover, making it a seamless addition to your motorcycle. The oval shape and compact dimensions ensure compatibility with various Harley Davidson models, providing a reliable upgrade for enthusiasts seeking improved engine efficiency.
Constructed from durable aluminum and finished in a sleek black powder coat, the RK Series assembly is designed for longevity and performance. The red cotton gauze filter not only adds a visual appeal but also ensures optimal airflow and filtration. This assembly is a practical choice for riders looking to enhance their motorcycle's performance while maintaining a factory look.
Features
- Designed To Get More Horsepower From Your Twin Cam Harley-Davidson Engine
- Includes An Innovative Powder Coated Billet Aluminum Backplate That Eliminates External Breathers
- Features A Built-In, Dyno-Tuned Velocity Stack
- Significant Airflow Increase To The Engine Without Sacrificing Filtration
- Retains A Factory Appearance By Utilizing The Stock Air Cleaner Cover
Specifications
- Manufacturer: K & N Filters
- Manufacturer Part Number: RK-3909-1
- Application: Harley Davidson Motorcycles
- Shape: Oval
- Diameter (IN): 7 Inch
- Height (IN): 1.688 Inch
- Top Design: No Logo
- Flange Diameter (IN): 2-1/4 Inch
- Finish: Powder Coated
- Color: Black
- Material: Aluminum
- Air Filter Diameter (IN): 8.813 Inch
- Air Filter Height (IN): 1-5/8 Inch
- Air Filter Color: Red
- Air Filter Material: Cotton Gauze Filter
- Wing Nut Type: No Wing Nut
- Wing Nut Color: No Wing Nut
- Estimated Install Time (Hours): 0.5
Compatibility / Fit
- 1999-2007 Harley Davidson FLHR Road King
- 2007-2007 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
- 2007-2007 Harley Davidson FLHTC Electra Glide Classic
- 2002-2006 Harley Davidson FLHTCI Electra Glide Classic
- 2007-2007 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
- 2006-2006 Harley Davidson FLHXI Street Glide
- 2006-2006 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
- 2006-2006 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
- 2007-2007 Harley Davidson FLTR Road Glide
- 2002-2006 Harley Davidson FLTRI Road Glide
- 2010-2011 Harley Davidson FLTRX Road Glide Custom
- 2008-2009 Harley Davidson FXCW Rocker
- 2008-2011 Harley Davidson FXCWC Rocker C
- 1999-2005 Harley Davidson FXD Dyna Super Glide
- 2007-2007 Harley Davidson FXD Dyna Super Glide
- 2007-2007 Harley Davidson FXDB Street Bob
- 2006-2006 Harley Davidson FXDBI Street Bob
- 2005-2005 Harley Davidson FXDC Super Glide Custom
- 2007-2007 Harley Davidson FXDC Super Glide Custom
- 2005-2006 Harley Davidson FXDCI Super Glide Custom
- 2004-2006 Harley Davidson FXDI Dyna Super Glide
- 2006-2006 Harley Davidson FXDI35 Dyna 35th Anniversary Super Glide
- 1999-2005 Harley Davidson FXDL Dyna Low Rider
- 2007-2007 Harley Davidson FXDL Dyna Low Rider
- 2004-2006 Harley Davidson FXDLI Dyna Low Rider
- 1999-2000 Harley Davidson FXDS-Conv Dyna Convertible
- 1999-2005 Harley Davidson FXDWG Dyna Wide Glide
- 2007-2007 Harley Davidson FXDWG Dyna Wide Glide
- 2001-2001 Harley Davidson FXDWG2
- 2002-2002 Harley Davidson FXDWG3
- 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
- 2000-2007 Harley Davidson FXST Softail Standard
- 2000-2009 Harley Davidson FXSTB Night Train
- 2001-2006 Harley Davidson FXSTBI Night Train
- 2007-2010 Harley Davidson FXSTC Softail Custom
- 2000-2007 Harley Davidson FXSTD Softail Deuce
- 2001-2006 Harley Davidson FXSTDI Softail Deuce
- 2001-2006 Harley Davidson FXSTI Softail Standard
- 2000-2006 Harley Davidson FXSTS Springer Softail
- 2001-2006 Harley Davidson FXSTSI Springer Softail
Technical Documents
Shipping & Returns
- This product ships within the continental USA only.
- This product typically ships within 1 to 3 business days.
- Returns are accepted within 30 days for items in like-new condition. For complete details, please see our return policy.
