K&N Oval Red 9in Intake System — Fits Harley Davidson 1999-2007

SKU: KNNRK-3910-1
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Sale price$249.99
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Car Wheel Size Chart

Wheel Diameter (inches) Tire Width (mm) Aspect Ratio Rim Width (inches)
14185655.5
15195606.0
16205556.5
17215507.0
18225457.5
19235408.0
20245358.5

Note: Wheel and tire sizes vary by car make and model. Always consult your vehicle’s manufacturer for exact specifications.

How to Read Tire Size

Example: 225/45R17 means:

  • 225 = Tire width in mm
  • 45 = Aspect ratio (height as % of width)
  • R17 = Rim diameter in inches

Product Details

Product Description
Part Numbers
Sizing & Fit

About K&N Engineering

K&N has been the world's leader in washable, reusable performance air filters since 1969. From the legendary cone filter to complete cold-air intake systems, K&N's cotton-gauze element delivers more airflow than paper while staying serviceable for the life of the vehicle.

Watch in action

K&N RK Series Oval Air Intake System - Red (9")

Unleash the power of your Harley Davidson Twin Cam engine with the K&N RK Series Oval Air Intake System. Engineered for performance, this system is built around K&N's legendary High-Flow Air Filter, renowned for its exceptional airflow and filtration capabilities. The RK-3910-1 features an innovative, powder-coated billet aluminum back plate that eliminates external breathers and incorporates a dyno-tuned velocity stack. This design significantly increases airflow to your engine, resulting in a noticeable boost in horsepower and torque without compromising filtration efficiency.

Performance and Design:

  • Increased Horsepower: Optimized airflow design delivers more power to your Twin Cam engine.
  • High-Flow Air Filter: Utilizes K&N's premium air filter for superior performance and protection.
  • Billet Aluminum Back Plate: Features a durable, powder-coated finish and integrated velocity stack for enhanced air intake.
  • Retains Stock Appearance: Designed to use your motorcycle's original air cleaner cover for a factory look.
  • Dyno-Tuned: Velocity stack is precisely tuned to maximize performance gains.
  • Larger Filter & Spacers: This RK-3910-1 model includes a larger air filter and longer spacers compared to the RK-3909-1 for even greater performance potential.

This K&N intake system is specifically designed for a wide range of Harley Davidson models from 1999 to 2007, including the Road King, Electra Glide, Heritage Softail, and Fat Boy. Installation is straightforward, allowing you to quickly upgrade your bike's performance. Experience the difference K&N engineering makes and elevate your riding experience. Find this and other high-performance parts at GGCRACING.

Vehicle Fitment

Years Make Model Trim
1999-2007 Harley-Davidson FLHR Road King Base
2007 Harley-Davidson FLHRC Road King Classic Base
2002-2006 Harley-Davidson FLHRCI Road King Classic Base
2003-2006 Harley-Davidson FLHRI Road King Base
2004-2007 Harley-Davidson FLHRS Road King Custom Base
2004-2006 Harley-Davidson FLHRSI Road King Custom Base
1999-2007 Harley-Davidson FLHT Electra Glide Standard Base
1999-2005 Harley-Davidson FLHTC Electra Glide Classic Base
2007 Harley-Davidson FLHTC Electra Glide Classic Base
2002-2006 Harley-Davidson FLHTCI Electra Glide Classic Base
2007 Harley-Davidson FLHTCU Electra Glide Ultra Classic Base
2002-2006 Harley-Davidson FLHTCUI Electra Glide Ultra Classic Base
2003-2006 Harley-Davidson FLHTI Electra Glide Standard Base
2006-2007 Harley-Davidson FLHX Street Glide Base
2006 Harley-Davidson FLHXI Street Glide Base
2006 Harley-Davidson FLST Heritage Softail Base
2000-2012 Harley-Davidson FLSTC Heritage Softail Classic Base
2002-2006 Harley-Davidson FLSTCI Heritage Softail Classic Base
2000-2012 Harley-Davidson FLSTF Fat Boy Base
2010-2012 Harley-Davidson FLSTFB Fat Boy Lo Base
2001-2006 Harley-Davidson FLSTFI Fat Boy Base
2006 Harley-Davidson FLSTI Heritage Softail Base
2005-2012 Harley-Davidson FLSTN Softail Deluxe Base
2005-2006 Harley-Davidson FLSTNI Softail Deluxe Base
2000-2003 Harley-Davidson FLSTS Heritage Springer Base
2005-2007 Harley-Davidson FLSTSC Softail Springer Classic Base
2005-2006 Harley-Davidson FLSTSCI Softail Springer Classic Base
2001-2003 Harley-Davidson FLSTSI Heritage Springer Base
1999-2002 Harley-Davidson FLTR Road Glide Base
2007 Harley-Davidson FLTR Road Glide Base
2002-2006 Harley-Davidson FLTRI Road Glide Base
2008-2009 Harley-Davidson FXCW Rocker Base
2008-2011 Harley-Davidson FXCWC Rocker C Base
1999-2007 Harley-Davidson FXD Dyna Super Glide Base
2007 Harley-Davidson FXDB Street Bob Base
2006 Harley-Davidson FXDBI Street Bob Base
2005 Harley-Davidson FXDC Super Glide Custom Base
2007 Harley-Davidson FXDC Super Glide Custom Base
2005-2006 Harley-Davidson FXDCI Super Glide Custom Base
2004-2006 Harley-Davidson FXDI Dyna Super Glide Base
2006 Harley-Davidson FXDI35 Dyna 35th Anniversary Super Glide Base
1999-2005 Harley-Davidson FXDL Dyna Low Rider Base
2007 Harley-Davidson FXDL Dyna Low Rider Base
2004-2006 Harley-Davidson FXDLI Dyna Low Rider Base
1999-2000 Harley-Davidson FXDS-Conv Dyna Convertible Base
1999-2007 Harley-Davidson FXDWG Dyna Wide Glide Base
2004-2006 Harley-Davidson FXDWGI Dyna Wide Glide Base
1999-2004 Harley-Davidson FXDX Dyna Super Glide Sport Base
2004-2005 Harley-Davidson FXDXI Dyna Super Glide Sport Base
2001-2003 Harley-Davidson FXDXT Dyna Super Glide T-Sport Base
2000-2009 Harley-Davidson FXST Softail Standard Base
2000-2009 Harley-Davidson FXSTB Night Train Base
2001-2006 Harley-Davidson FXSTBI Night Train Base
2007-2010 Harley-Davidson FXSTC Softail Custom Base
2000-2007 Harley-Davidson FXSTD Softail Deuce Base
2001-2006 Harley-Davidson FXSTDI Softail Deuce Base
2001-2006 Harley-Davidson FXSTI Softail Standard Base
2000-2006 Harley-Davidson FXSTS Springer Softail Base
2001-2006 Harley-Davidson FXSTSI Springer Softail Base

Product Details

Product Description
Part Numbers
Sizing & Fit

About K&N Engineering

K&N has been the world's leader in washable, reusable performance air filters since 1969. From the legendary cone filter to complete cold-air intake systems, K&N's cotton-gauze element delivers more airflow than paper while staying serviceable for the life of the vehicle.

Watch in action

K&N RK Series Oval Air Intake System - Red (9")

Unleash the power of your Harley Davidson Twin Cam engine with the K&N RK Series Oval Air Intake System. Engineered for performance, this system is built around K&N's legendary High-Flow Air Filter, renowned for its exceptional airflow and filtration capabilities. The RK-3910-1 features an innovative, powder-coated billet aluminum back plate that eliminates external breathers and incorporates a dyno-tuned velocity stack. This design significantly increases airflow to your engine, resulting in a noticeable boost in horsepower and torque without compromising filtration efficiency.

Performance and Design:

  • Increased Horsepower: Optimized airflow design delivers more power to your Twin Cam engine.
  • High-Flow Air Filter: Utilizes K&N's premium air filter for superior performance and protection.
  • Billet Aluminum Back Plate: Features a durable, powder-coated finish and integrated velocity stack for enhanced air intake.
  • Retains Stock Appearance: Designed to use your motorcycle's original air cleaner cover for a factory look.
  • Dyno-Tuned: Velocity stack is precisely tuned to maximize performance gains.
  • Larger Filter & Spacers: This RK-3910-1 model includes a larger air filter and longer spacers compared to the RK-3909-1 for even greater performance potential.

This K&N intake system is specifically designed for a wide range of Harley Davidson models from 1999 to 2007, including the Road King, Electra Glide, Heritage Softail, and Fat Boy. Installation is straightforward, allowing you to quickly upgrade your bike's performance. Experience the difference K&N engineering makes and elevate your riding experience. Find this and other high-performance parts at GGCRACING.

Vehicle Fitment

Years Make Model Trim
1999-2007 Harley-Davidson FLHR Road King Base
2007 Harley-Davidson FLHRC Road King Classic Base
2002-2006 Harley-Davidson FLHRCI Road King Classic Base
2003-2006 Harley-Davidson FLHRI Road King Base
2004-2007 Harley-Davidson FLHRS Road King Custom Base
2004-2006 Harley-Davidson FLHRSI Road King Custom Base
1999-2007 Harley-Davidson FLHT Electra Glide Standard Base
1999-2005 Harley-Davidson FLHTC Electra Glide Classic Base
2007 Harley-Davidson FLHTC Electra Glide Classic Base
2002-2006 Harley-Davidson FLHTCI Electra Glide Classic Base
2007 Harley-Davidson FLHTCU Electra Glide Ultra Classic Base
2002-2006 Harley-Davidson FLHTCUI Electra Glide Ultra Classic Base
2003-2006 Harley-Davidson FLHTI Electra Glide Standard Base
2006-2007 Harley-Davidson FLHX Street Glide Base
2006 Harley-Davidson FLHXI Street Glide Base
2006 Harley-Davidson FLST Heritage Softail Base
2000-2012 Harley-Davidson FLSTC Heritage Softail Classic Base
2002-2006 Harley-Davidson FLSTCI Heritage Softail Classic Base
2000-2012 Harley-Davidson FLSTF Fat Boy Base
2010-2012 Harley-Davidson FLSTFB Fat Boy Lo Base
2001-2006 Harley-Davidson FLSTFI Fat Boy Base
2006 Harley-Davidson FLSTI Heritage Softail Base
2005-2012 Harley-Davidson FLSTN Softail Deluxe Base
2005-2006 Harley-Davidson FLSTNI Softail Deluxe Base
2000-2003 Harley-Davidson FLSTS Heritage Springer Base
2005-2007 Harley-Davidson FLSTSC Softail Springer Classic Base
2005-2006 Harley-Davidson FLSTSCI Softail Springer Classic Base
2001-2003 Harley-Davidson FLSTSI Heritage Springer Base
1999-2002 Harley-Davidson FLTR Road Glide Base
2007 Harley-Davidson FLTR Road Glide Base
2002-2006 Harley-Davidson FLTRI Road Glide Base
2008-2009 Harley-Davidson FXCW Rocker Base
2008-2011 Harley-Davidson FXCWC Rocker C Base
1999-2007 Harley-Davidson FXD Dyna Super Glide Base
2007 Harley-Davidson FXDB Street Bob Base
2006 Harley-Davidson FXDBI Street Bob Base
2005 Harley-Davidson FXDC Super Glide Custom Base
2007 Harley-Davidson FXDC Super Glide Custom Base
2005-2006 Harley-Davidson FXDCI Super Glide Custom Base
2004-2006 Harley-Davidson FXDI Dyna Super Glide Base
2006 Harley-Davidson FXDI35 Dyna 35th Anniversary Super Glide Base
1999-2005 Harley-Davidson FXDL Dyna Low Rider Base
2007 Harley-Davidson FXDL Dyna Low Rider Base
2004-2006 Harley-Davidson FXDLI Dyna Low Rider Base
1999-2000 Harley-Davidson FXDS-Conv Dyna Convertible Base
1999-2007 Harley-Davidson FXDWG Dyna Wide Glide Base
2004-2006 Harley-Davidson FXDWGI Dyna Wide Glide Base
1999-2004 Harley-Davidson FXDX Dyna Super Glide Sport Base
2004-2005 Harley-Davidson FXDXI Dyna Super Glide Sport Base
2001-2003 Harley-Davidson FXDXT Dyna Super Glide T-Sport Base
2000-2009 Harley-Davidson FXST Softail Standard Base
2000-2009 Harley-Davidson FXSTB Night Train Base
2001-2006 Harley-Davidson FXSTBI Night Train Base
2007-2010 Harley-Davidson FXSTC Softail Custom Base
2000-2007 Harley-Davidson FXSTD Softail Deuce Base
2001-2006 Harley-Davidson FXSTDI Softail Deuce Base
2001-2006 Harley-Davidson FXSTI Softail Standard Base
2000-2006 Harley-Davidson FXSTS Springer Softail Base
2001-2006 Harley-Davidson FXSTSI Springer Softail Base

Product Details

Product Description

About K&N Engineering

K&N has been the world's leader in washable, reusable performance air filters since 1969. From the legendary cone filter to complete cold-air intake systems, K&N's cotton-gauze element delivers more airflow than paper while staying serviceable for the life of the vehicle.

Watch in action

K&N RK Series Oval Air Intake System - Red (9")

Unleash the power of your Harley Davidson Twin Cam engine with the K&N RK Series Oval Air Intake System. Engineered for performance, this system is built around K&N's legendary High-Flow Air Filter, renowned for its exceptional airflow and filtration capabilities. The RK-3910-1 features an innovative, powder-coated billet aluminum back plate that eliminates external breathers and incorporates a dyno-tuned velocity stack. This design significantly increases airflow to your engine, resulting in a noticeable boost in horsepower and torque without compromising filtration efficiency.

Performance and Design:

  • Increased Horsepower: Optimized airflow design delivers more power to your Twin Cam engine.
  • High-Flow Air Filter: Utilizes K&N's premium air filter for superior performance and protection.
  • Billet Aluminum Back Plate: Features a durable, powder-coated finish and integrated velocity stack for enhanced air intake.
  • Retains Stock Appearance: Designed to use your motorcycle's original air cleaner cover for a factory look.
  • Dyno-Tuned: Velocity stack is precisely tuned to maximize performance gains.
  • Larger Filter & Spacers: This RK-3910-1 model includes a larger air filter and longer spacers compared to the RK-3909-1 for even greater performance potential.

This K&N intake system is specifically designed for a wide range of Harley Davidson models from 1999 to 2007, including the Road King, Electra Glide, Heritage Softail, and Fat Boy. Installation is straightforward, allowing you to quickly upgrade your bike's performance. Experience the difference K&N engineering makes and elevate your riding experience. Find this and other high-performance parts at GGCRACING.

Vehicle Fitment

Years Make Model Trim
1999-2007 Harley-Davidson FLHR Road King Base
2007 Harley-Davidson FLHRC Road King Classic Base
2002-2006 Harley-Davidson FLHRCI Road King Classic Base
2003-2006 Harley-Davidson FLHRI Road King Base
2004-2007 Harley-Davidson FLHRS Road King Custom Base
2004-2006 Harley-Davidson FLHRSI Road King Custom Base
1999-2007 Harley-Davidson FLHT Electra Glide Standard Base
1999-2005 Harley-Davidson FLHTC Electra Glide Classic Base
2007 Harley-Davidson FLHTC Electra Glide Classic Base
2002-2006 Harley-Davidson FLHTCI Electra Glide Classic Base
2007 Harley-Davidson FLHTCU Electra Glide Ultra Classic Base
2002-2006 Harley-Davidson FLHTCUI Electra Glide Ultra Classic Base
2003-2006 Harley-Davidson FLHTI Electra Glide Standard Base
2006-2007 Harley-Davidson FLHX Street Glide Base
2006 Harley-Davidson FLHXI Street Glide Base
2006 Harley-Davidson FLST Heritage Softail Base
2000-2012 Harley-Davidson FLSTC Heritage Softail Classic Base
2002-2006 Harley-Davidson FLSTCI Heritage Softail Classic Base
2000-2012 Harley-Davidson FLSTF Fat Boy Base
2010-2012 Harley-Davidson FLSTFB Fat Boy Lo Base
2001-2006 Harley-Davidson FLSTFI Fat Boy Base
2006 Harley-Davidson FLSTI Heritage Softail Base
2005-2012 Harley-Davidson FLSTN Softail Deluxe Base
2005-2006 Harley-Davidson FLSTNI Softail Deluxe Base
2000-2003 Harley-Davidson FLSTS Heritage Springer Base
2005-2007 Harley-Davidson FLSTSC Softail Springer Classic Base
2005-2006 Harley-Davidson FLSTSCI Softail Springer Classic Base
2001-2003 Harley-Davidson FLSTSI Heritage Springer Base
1999-2002 Harley-Davidson FLTR Road Glide Base
2007 Harley-Davidson FLTR Road Glide Base
2002-2006 Harley-Davidson FLTRI Road Glide Base
2008-2009 Harley-Davidson FXCW Rocker Base
2008-2011 Harley-Davidson FXCWC Rocker C Base
1999-2007 Harley-Davidson FXD Dyna Super Glide Base
2007 Harley-Davidson FXDB Street Bob Base
2006 Harley-Davidson FXDBI Street Bob Base
2005 Harley-Davidson FXDC Super Glide Custom Base
2007 Harley-Davidson FXDC Super Glide Custom Base
2005-2006 Harley-Davidson FXDCI Super Glide Custom Base
2004-2006 Harley-Davidson FXDI Dyna Super Glide Base
2006 Harley-Davidson FXDI35 Dyna 35th Anniversary Super Glide Base
1999-2005 Harley-Davidson FXDL Dyna Low Rider Base
2007 Harley-Davidson FXDL Dyna Low Rider Base
2004-2006 Harley-Davidson FXDLI Dyna Low Rider Base
1999-2000 Harley-Davidson FXDS-Conv Dyna Convertible Base
1999-2007 Harley-Davidson FXDWG Dyna Wide Glide Base
2004-2006 Harley-Davidson FXDWGI Dyna Wide Glide Base
1999-2004 Harley-Davidson FXDX Dyna Super Glide Sport Base
2004-2005 Harley-Davidson FXDXI Dyna Super Glide Sport Base
2001-2003 Harley-Davidson FXDXT Dyna Super Glide T-Sport Base
2000-2009 Harley-Davidson FXST Softail Standard Base
2000-2009 Harley-Davidson FXSTB Night Train Base
2001-2006 Harley-Davidson FXSTBI Night Train Base
2007-2010 Harley-Davidson FXSTC Softail Custom Base
2000-2007 Harley-Davidson FXSTD Softail Deuce Base
2001-2006 Harley-Davidson FXSTDI Softail Deuce Base
2001-2006 Harley-Davidson FXSTI Softail Standard Base
2000-2006 Harley-Davidson FXSTS Springer Softail Base
2001-2006 Harley-Davidson FXSTSI Springer Softail Base

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