K&N Red Intake System for Harley-Davidson
Special Order
This part is still available to order. Once you place your order, we’ll submit it directly to K&N Engineering, and they’ll ship it straight to you.
Delivery times can vary depending on the brand, so we can’t guarantee an exact arrival date. What we can guarantee is that we’ll stay on top of your order, monitor its progress, and keep you updated until it reaches your door.
Special-order items are typically not kept in stock by most retailers. By ordering through us, your order is placed directly with K&N Engineering, assuring you get the part as quickly as possible.
Want to get an estimated delivery timeframe before ordering? Contact us through our contact page, and we’ll be happy to find out for you.
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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.
Installation InstructionsUser 1
User 1
- Washable & Reusable Air Filter: Includes a High-Flow Air Filter that can go up to 100,000 miles before cleaning under normal highway driving conditions.
- Designed to increase horsepower & torque
- Dyno-tuned velocity stack
- Excellent air filtration
- Washable and reusable
This Part Fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 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 |
| 1999-2005,2007 | 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 |
| 1999-2002,2007 | 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 |
| 2005,2007 | 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 |
| 1999-2005,2007 | 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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