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Ships within 48 hours · Estimated delivery Aug 10 - Aug 15
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For Your Every Summer RSVP, with Code: SUMMER15
Description
K&N Oval Red 9in Intake System for Harley DavidsonK&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
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.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 |
| 2010-2011 | Harley-Davidson | FLTRX Road Glide Custom | 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 |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.2 ★★★★★
Based on 16 reviews
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Product Reviews
★★★★★ 5
Love these.
Number of Items: 3, Color: White (3-pairs), Size: Medium
I have them in black and white. I use them everyday in all shoes. These are very versatile and a great quality material. They take a looong time to wear and they stay in place. Very washable and good material. They are not too thick and they do not shrink. I do air dry mine. They do not hold smells even in the summer heat.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 7, 2024
★★★★★ 5
Perfect!
Number of Items: 3, Color: Pink Quartz Assorted (3-pairs), Size: Medium
My new favorite socks! True to size, fit perfectly, and the best part is they do not slide off your foot! 10/10 recommend!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 10, 2025
★★★★★ 5
The perfect sock!
Size: 6-10, Color: Halo Gray/Assorted
The only socks that I can wear with my hey dudes. They stay on my ankles and never slid down into the shoe. I will forever order these as long as they are available. They are comfy too!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 21, 2025
★★★★★ 5
Good option, especially in warmer weather
Size: 6-10, Color: Black
High quality socks and very durable. Nice touch adding the grip on the back of the ankle so the sock stays up. Size is a true fit to the size of your foot as well.
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Reviewed in the United States on April 17, 2025
★★★★★ 5
Love these socks!
Size: 6-10, Color: White
Comfortable, no show, and most importantly The Do No Slip!!!! I keep coming back to add to my supply because they have become the only sock I wear. I’ve been using them for a couple years now and they hold to great to washing, bleaching and the dryer. Highly recommended.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 24, 2024
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