K&N Intake System- for Harley-Davidson
Part # RK-3909-1
Features
- Designed to increase horsepower & torque
- Dyno-tuned velocity stack
- Washable and reusable
- Excellent air filtration
Description
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.
Specifications
| Air Box Included | No |
|---|---|
| Air Filter Color | Red |
| Air Filter Height | 1.625 in (41 mm) |
| Air Filter Inside Diameter | 6.188 in (157 mm) |
| Air Filter Material | Cotton Gauze |
| Air Filter Outlet Shape | Not Flanged |
| Air Filter Shape | Round |
| Air Filter Washable | Yes |
| CARB EO Number | D-269-35/55 |
| Clamp Color/Finish | Not Applicable |
| Clamp Material | No Clamps Required |
| Clamp Style | No Clamps Required |
| Clamps Included | No Clamps Included |
| Color / Finish | Red Filter, Metal Top |
| Couplers Included | None |
| Estimated Horsepower Gain | 6.05 HP @ 5206 RPM |
| Inlet Diameter | 2.25 in (57 mm) |
| Mass Air Flow Sensor Adapter Included | No |
| Mounting Hardware Included | Yes |
| Neck Flange | 2.25 in (57 mm) |
| Oil Included | Yes |
| Overall Height | 1.688 in (43 mm) |
| Package Material | Paperboard |
| Package Type | Box |
| Product Style | Motorcycle Intake System |
| Replacement Filter | E-3972 |
| Size | 7 Inch |
| Street Legal In All US States | Not legal for sale or use in California on any pollution controlled motor vehicle. NOTE: Some specific models and years may be legal in CA. Check the CARB status on your parts at knfilters.com. |
| Style | Oval |
| Top Material | Black Powder Coated |
| UPC / GTIN | 00024844294135 |
| Warranty | No-Hassle Lifetime Limited warranty |
| Year | Make | Model | Note |
|---|---|---|---|
| 2002 - 2006 | Harley-Davidson | FLHRCI Road King Classic | With 1-5/8 Inch Tall Filter; California Air Resources Board Exempt: Yes; CARB EO: D-269-55; Motorcycle Intake System - 1-5/8 inch Tall Filter |
| 2007 | Harley-Davidson | FLHRC Road King Classic | With 1-5/8 Inch Tall Filter; California Air Resources Board Exempt: Yes; CARB EO: D-269-55; Motorcycle Intake System - 1-5/8 inch Tall Filter |
| 2003 - 2006 | Harley-Davidson | FLHRI Road King | With 1-5/8 Inch Tall Filter; California Air Resources Board Exempt: Yes; CARB EO: D-269-55; Motorcycle Intake System - 1-5/8 inch Tall Filter |
| 1999 - 2001 | Harley-Davidson | FLHR Road King | With 1-5/8 Inch Tall Filter; California Air Resources Board Exempt: No; Motorcycle Intake System - 1-5/8 inch Tall Filter |
| 2002 - 2007 | Harley-Davidson | FLHR Road King | With 1-5/8 Inch Tall Filter; California Air Resources Board Exempt: Yes; CARB EO: D-269-55; Motorcycle Intake System - 1-5/8 inch Tall Filter |
| 2004 - 2006 | Harley-Davidson | FLHRSI Road King Custom | With 1-5/8 Inch Tall Filter; California Air Resources Board Exempt: Yes; CARB EO: D-269-55; Motorcycle Intake System - 1-5/8 inch Tall Filter |
| 2004 - 2007 | Harley-Davidson | FLHRS Road King Custom | With 1-5/8 Inch Tall Filter; California Air Resources Board Exempt: Yes; CARB EO: D-269-55; Motorcycle Intake System - 1-5/8 inch Tall Filter |
| 1999 - 2001 | Harley-Davidson | FLHTC Electra Glide Classic | With 1-5/8 Inch Tall Filter; California Air Resources Board Exempt: No; Motorcycle Intake System - 1-5/8 inch Tall Filter |
| 2002 - 2005 | Harley-Davidson | FLHTC Electra Glide Classic | With 1-5/8 Inch Tall Filter; California Air Resources Board Exempt: Yes; CARB EO: D-269-55; Motorcycle Intake System - 1-5/8 inch Tall Filter |
| 2007 | Harley-Davidson | FLHTC Electra Glide Classic | With 1-5/8 Inch Tall Filter; California Air Resources Board Exempt: Yes; CARB EO: D-269-55; Motorcycle Intake System - 1-5/8 inch Tall Filter |
| 2002 - 2006 | Harley-Davidson | FLHTCI Electra Glide Classic | With 1-5/8 Inch Tall Filter; California Air Resources Board Exempt: Yes; CARB EO: D-269-55; Motorcycle Intake System - 1-5/8 inch Tall Filter |
| 2007 | Harley-Davidson | FLHTCU Electra Glide Ultra Classic | With 1-5/8 Inch Tall Filter; California Air Resources Board Exempt: Yes; CARB EO: D-269-55; Motorcycle Intake System - 1-5/8 inch Tall Filter |
| 2002 - 2006 | Harley-Davidson | FLHTCUI Electra Glide Ultra Classic | With 1-5/8 Inch Tall Filter; California Air Resources Board Exempt: Yes; CARB EO: D-269-55; Motorcycle Intake System - 1-5/8 inch Tall Filter |
| 1999 - 2001 | Harley-Davidson | FLHT Electra Glide Standard | With 1-5/8 Inch Tall Filter; California Air Resources Board Exempt: No; Motorcycle Intake System - 1-5/8 inch Tall Filter |
| 2002 - 2007 | Harley-Davidson | FLHT Electra Glide Standard | With 1-5/8 Inch Tall Filter; California Air Resources Board Exempt: Yes; CARB EO: D-269-55; Motorcycle Intake System - 1-5/8 inch Tall Filter |
| 2003 - 2006 | Harley-Davidson | FLHTI Electra Glide Standard | With 1-5/8 Inch Tall Filter; California Air Resources Board Exempt: Yes; CARB EO: D-269-55; Motorcycle Intake System - 1-5/8 inch Tall Filter |
| 2006 | Harley-Davidson | FLHXI Street Glide | With 1-5/8 Inch Tall Filter; California Air Resources Board Exempt: Yes; CARB EO: D-269-55; Motorcycle Intake System - 1-5/8 inch Tall Filter |
| 2006 - 2007 | Harley-Davidson | FLHX Street Glide | With 1-5/8 Inch Tall Filter; California Air Resources Board Exempt: Yes; CARB EO: D-269-55; Motorcycle Intake System - 1-5/8 inch Tall Filter |
| 2000 | Harley-Davidson | FLSTC Heritage Softail Classic | With 1-5/8 Inch Tall Filter; California Air Resources Board Exempt: No; Motorcycle Intake System - 1-5/8 inch Tall Filter |
| 2001 - 2012 | Harley-Davidson | FLSTC Heritage Softail Classic | With 1-5/8 Inch Tall Filter; California Air Resources Board Exempt: Yes; CARB EO: D-269-55; Motorcycle Intake System - 1-5/8 inch Tall Filter |
| 2002 - 2006 | Harley-Davidson | FLSTCI Heritage Softail Classic | With 1-5/8 Inch Tall Filter; California Air Resources Board Exempt: Yes; CARB EO: D-269-55; Motorcycle Intake System - 1-5/8 inch Tall Filter |
| 2010 - 2012 | Harley-Davidson | FLSTFB Fat Boy Lo | With 1-5/8 Inch Tall Filter; California Air Resources Board Exempt: Yes; CARB EO: D-269-55; Motorcycle Intake System - 1-5/8 inch Tall Filter |
| 2000 | Harley-Davidson | FLSTF Fat Boy | With 1-5/8 Inch Tall Filter; California Air Resources Board Exempt: No; Motorcycle Intake System - 1-5/8 inch Tall Filter |
| 2001 - 2012 | Harley-Davidson | FLSTF Fat Boy | With 1-5/8 Inch Tall Filter; California Air Resources Board Exempt: Yes; CARB EO: D-269-55; Motorcycle Intake System - 1-5/8 inch Tall Filter |
| 2001 - 2006 | Harley-Davidson | FLSTFI Fat Boy | With 1-5/8 Inch Tall Filter; California Air Resources Board Exempt: Yes; CARB EO: D-269-55; Motorcycle Intake System - 1-5/8 inch Tall Filter |
| 2006 | Harley-Davidson | FLST Heritage Softail | With 1-5/8 Inch Tall Filter; California Air Resources Board Exempt: Yes; CARB EO: D-269-55; Motorcycle Intake System - 1-5/8 inch Tall Filter |
| 2006 | Harley-Davidson | FLSTI Heritage Softail | With 1-5/8 Inch Tall Filter; California Air Resources Board Exempt: Yes; CARB EO: D-269-55; Motorcycle Intake System - 1-5/8 inch Tall Filter |
| 2005 - 2006 | Harley-Davidson | FLSTNI Softail Deluxe | With 1-5/8 Inch Tall Filter; California Air Resources Board Exempt: Yes; CARB EO: D-269-55; Motorcycle Intake System - 1-5/8 inch Tall Filter |
| 2005 - 2012 | Harley-Davidson | FLSTN Softail Deluxe | With 1-5/8 Inch Tall Filter; California Air Resources Board Exempt: Yes; CARB EO: D-269-55; Motorcycle Intake System - 1-5/8 inch Tall Filter |
| 2005 - 2006 | Harley-Davidson | FLSTSCI Softail Springer Classic | With 1-5/8 Inch Tall Filter; California Air Resources Board Exempt: Yes; CARB EO: D-269-55; Motorcycle Intake System - 1-5/8 inch Tall Filter |
| 2005 - 2007 | Harley-Davidson | FLSTSC Softail Springer Classic | With 1-5/8 Inch Tall Filter; California Air Resources Board Exempt: Yes; CARB EO: D-269-55; Motorcycle Intake System - 1-5/8 inch Tall Filter |
| 2000 | Harley-Davidson | FLSTS Heritage Springer | With 1-5/8 Inch Tall Filter; California Air Resources Board Exempt: No; Motorcycle Intake System - 1-5/8 inch Tall Filter |
| 2001 - 2003 | Harley-Davidson | FLSTS Heritage Springer | With 1-5/8 Inch Tall Filter; California Air Resources Board Exempt: Yes; CARB EO: D-269-55; Motorcycle Intake System - 1-5/8 inch Tall Filter |
| 2001 - 2003 | Harley-Davidson | FLSTSI Heritage Springer | With 1-5/8 Inch Tall Filter; California Air Resources Board Exempt: Yes; CARB EO: D-269-55; Motorcycle Intake System - 1-5/8 inch Tall Filter |
| 2002 - 2006 | Harley-Davidson | FLTRI Road Glide | With 1-5/8 Inch Tall Filter; California Air Resources Board Exempt: Yes; CARB EO: D-269-55; Motorcycle Intake System - 1-5/8 inch Tall Filter |
| 1999 - 2001 | Harley-Davidson | FLTR Road Glide | With 1-5/8 Inch Tall Filter; California Air Resources Board Exempt: No; Motorcycle Intake System - 1-5/8 inch Tall Filter |
| 2002 | Harley-Davidson | FLTR Road Glide | With 1-5/8 Inch Tall Filter; California Air Resources Board Exempt: Yes; CARB EO: D-269-55; Motorcycle Intake System - 1-5/8 inch Tall Filter |
| 2007 | Harley-Davidson | FLTR Road Glide | With 1-5/8 Inch Tall Filter; California Air Resources Board Exempt: Yes; CARB EO: D-269-55; Motorcycle Intake System - 1-5/8 inch Tall Filter |
| 2008 - 2011 | Harley-Davidson | FXCWC Rocker C | With 1-5/8 Inch Tall Filter; California Air Resources Board Exempt: Yes; CARB EO: D-269-55; Motorcycle Intake System - 1-5/8 inch Tall Filter |
| 2008 | Harley-Davidson | FXCW Rocker | With 1-5/8 Inch Tall Filter; California Air Resources Board Exempt: Yes; CARB EO: D-269-55; Motorcycle Intake System - 1-5/8 inch Tall Filter |
| 2009 | Harley-Davidson | FXCW Rocker | With 1-5/8 Inch Tall Filter; California Air Resources Board Exempt: No; Motorcycle Intake System - 1-5/8 inch Tall Filter |
| 2006 | Harley-Davidson | FXDBI Street Bob | With 1-5/8 Inch Tall Filter; California Air Resources Board Exempt: Yes; CARB EO: D-269-35; Motorcycle Intake System - 1-5/8 inch Tall Filter |
| 2007 | Harley-Davidson | FXDB Street Bob | With 1-5/8 Inch Tall Filter; California Air Resources Board Exempt: Yes; CARB EO: D-269-55; Motorcycle Intake System - 1-5/8 inch Tall Filter |
| 2005 - 2006 | Harley-Davidson | FXDCI Super Glide Custom | With 1-5/8 Inch Tall Filter; California Air Resources Board Exempt: Yes; CARB EO: D-269-55; Motorcycle Intake System - 1-5/8 inch Tall Filter |
| 2005 | Harley-Davidson | FXDC Super Glide Custom | With 1-5/8 Inch Tall Filter; California Air Resources Board Exempt: Yes; CARB EO: D-269-55; Motorcycle Intake System - 1-5/8 inch Tall Filter |
| 2007 | Harley-Davidson | FXDC Super Glide Custom | With 1-5/8 Inch Tall Filter; California Air Resources Board Exempt: Yes; CARB EO: D-269-35; Motorcycle Intake System - 1-5/8 inch Tall Filter |
| 1999 - 2003 | Harley-Davidson | FXD Dyna Super Glide | With 1-5/8 Inch Tall Filter; California Air Resources Board Exempt: No; Motorcycle Intake System - 1-5/8 inch Tall Filter |
| 2004 - 2007 | Harley-Davidson | FXD Dyna Super Glide | With 1-5/8 Inch Tall Filter; California Air Resources Board Exempt: Yes; CARB EO: D-269-55; Motorcycle Intake System - 1-5/8 inch Tall Filter |
| 2006 | Harley-Davidson | FXDI35 Dyna 35th Anniversary Super Glide | With 1-5/8 Inch Tall Filter; California Air Resources Board Exempt: Yes; CARB EO: D-269-35; Motorcycle Intake System - 1-5/8 inch Tall Filter |
| 2004 - 2006 | Harley-Davidson | FXDI Dyna Super Glide | With 1-5/8 Inch Tall Filter; California Air Resources Board Exempt: Yes; CARB EO: D-269-55; Motorcycle Intake System - 1-5/8 inch Tall Filter |
| 1999 - 2003 | Harley-Davidson | FXDL Dyna Low Rider | With 1-5/8 Inch Tall Filter; California Air Resources Board Exempt: No; Motorcycle Intake System - 1-5/8 inch Tall Filter |
| 2004 - 2005 | Harley-Davidson | FXDL Dyna Low Rider | With 1-5/8 Inch Tall Filter; California Air Resources Board Exempt: Yes; CARB EO: D-269-55; Motorcycle Intake System - 1-5/8 inch Tall Filter |
| 2007 | Harley-Davidson | FXDL Dyna Low Rider | With 1-5/8 Inch Tall Filter; California Air Resources Board Exempt: Yes; CARB EO: D-269-55; Motorcycle Intake System - 1-5/8 inch Tall Filter |
| 2004 - 2006 | Harley-Davidson | FXDLI Dyna Low Rider | With 1-5/8 Inch Tall Filter; California Air Resources Board Exempt: Yes; CARB EO: D-269-55; Motorcycle Intake System - 1-5/8 inch Tall Filter |
| 1999 - 2000 | Harley-Davidson | FXDS-Conv Dyna Convertible | With 1-5/8 Inch Tall Filter; California Air Resources Board Exempt: No; Motorcycle Intake System - 1-5/8 inch Tall Filter |
| 1999 - 2003 | Harley-Davidson | FXDWG Dyna Wide Glide | With 1-5/8 Inch Tall Filter; California Air Resources Board Exempt: No; Motorcycle Intake System - 1-5/8 inch Tall Filter |
| 2004 - 2007 | Harley-Davidson | FXDWG Dyna Wide Glide | With 1-5/8 Inch Tall Filter; California Air Resources Board Exempt: Yes; CARB EO: D-269-55; Motorcycle Intake System - 1-5/8 inch Tall Filter |
| 2004 - 2006 | Harley-Davidson | FXDWGI Dyna Wide Glide | With 1-5/8 Inch Tall Filter; California Air Resources Board Exempt: Yes; CARB EO: D-269-55; Motorcycle Intake System - 1-5/8 inch Tall Filter |
| 1999 - 2003 | Harley-Davidson | FXDX Dyna Super Glide Sport | With 1-5/8 Inch Tall Filter; California Air Resources Board Exempt: No; Motorcycle Intake System - 1-5/8 inch Tall Filter |
| 2004 | Harley-Davidson | FXDX Dyna Super Glide Sport | With 1-5/8 Inch Tall Filter; California Air Resources Board Exempt: Yes; CARB EO: D-269-55; Motorcycle Intake System - 1-5/8 inch Tall Filter |
| 2004 - 2005 | Harley-Davidson | FXDXI Dyna Super Glide Sport | With 1-5/8 Inch Tall Filter; California Air Resources Board Exempt: Yes; CARB EO: D-269-55; Motorcycle Intake System - 1-5/8 inch Tall Filter |
| 2001 - 2003 | Harley-Davidson | FXDXT Dyna Super Glide T-Sport | With 1-5/8 Inch Tall Filter; California Air Resources Board Exempt: No; Motorcycle Intake System - 1-5/8 inch Tall Filter |
| 2001 - 2006 | Harley-Davidson | FXSTBI Night Train | With 1-5/8 Inch Tall Filter; California Air Resources Board Exempt: Yes; CARB EO: D-269-55; Motorcycle Intake System - 1-5/8 inch Tall Filter |
| 2000 | Harley-Davidson | FXSTB Night Train | With 1-5/8 Inch Tall Filter; California Air Resources Board Exempt: No; Motorcycle Intake System - 1-5/8 inch Tall Filter |
| 2001 - 2007 | Harley-Davidson | FXSTB Night Train | With 1-5/8 Inch Tall Filter; California Air Resources Board Exempt: Yes; CARB EO: D-269-55; Motorcycle Intake System - 1-5/8 inch Tall Filter |
| 2008 - 2009 | Harley-Davidson | FXSTB Night Train | With 1-5/8 Inch Tall Filter; California Air Resources Board Exempt: No; Motorcycle Intake System - 1-5/8 inch Tall Filter |
| 2007 - 2010 | Harley-Davidson | FXSTC Softail Custom | With 1-5/8 Inch Tall Filter; California Air Resources Board Exempt: Yes; CARB EO: D-269-55; Motorcycle Intake System - 1-5/8 inch Tall Filter |
| 2001 - 2006 | Harley-Davidson | FXSTDI Softail Deuce | With 1-5/8 Inch Tall Filter; California Air Resources Board Exempt: Yes; CARB EO: D-269-55; Motorcycle Intake System - 1-5/8 inch Tall Filter |
| 2000 | Harley-Davidson | FXSTD Softail Deuce | With 1-5/8 Inch Tall Filter; California Air Resources Board Exempt: No; Motorcycle Intake System - 1-5/8 inch Tall Filter |
| 2001 - 2007 | Harley-Davidson | FXSTD Softail Deuce | With 1-5/8 Inch Tall Filter; California Air Resources Board Exempt: Yes; CARB EO: D-269-55; Motorcycle Intake System - 1-5/8 inch Tall Filter |
| 2001 - 2006 | Harley-Davidson | FXSTI Softail Standard | With 1-5/8 Inch Tall Filter; California Air Resources Board Exempt: Yes; CARB EO: D-269-55; Motorcycle Intake System - 1-5/8 inch Tall Filter |
| 2001 - 2006 | Harley-Davidson | FXSTSI Springer Softail | With 1-5/8 Inch Tall Filter; California Air Resources Board Exempt: Yes; CARB EO: D-269-55; Motorcycle Intake System - 1-5/8 inch Tall Filter |
| 2000 | Harley-Davidson | FXST Softail Standard | With 1-5/8 Inch Tall Filter; California Air Resources Board Exempt: No; Motorcycle Intake System - 1-5/8 inch Tall Filter |
| 2001 - 2009 | Harley-Davidson | FXST Softail Standard | With 1-5/8 Inch Tall Filter; California Air Resources Board Exempt: Yes; CARB EO: D-269-55; Motorcycle Intake System - 1-5/8 inch Tall Filter |
| 2000 | Harley-Davidson | FXSTS Springer Softail | With 1-5/8 Inch Tall Filter; California Air Resources Board Exempt: No; Motorcycle Intake System - 1-5/8 inch Tall Filter |
| 2001 - 2006 | Harley-Davidson | FXSTS Springer Softail | With 1-5/8 Inch Tall Filter; California Air Resources Board Exempt: Yes; CARB EO: D-269-55; Motorcycle Intake System - 1-5/8 inch Tall Filter |