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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.
Installation InstructionsUser 1
This Part Fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1999-2017 | Harley-Davidson | FLHR Road King | Base |
| 2007-2013 | 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 |
| 1999-2009 | Harley-Davidson | FLHT Electra Glide Standard | Base |
| 1999-2005,2007-2013 | Harley-Davidson | FLHTC Electra Glide Classic | Base |
| 2002-2006 | Harley-Davidson | FLHTCI Electra Glide Classic | Base |
| 2007-2017 | Harley-Davidson | FLHTCU Electra Glide Ultra Classic | Base |
| 2002-2006 | Harley-Davidson | FLHTCUI Electra Glide Ultra Classic | Base |
| 2009-2013 | Harley-Davidson | FLHTCUTG Tri Glide Ultra Classic | Base |
| 2003-2006 | Harley-Davidson | FLHTI Electra Glide Standard | Base |
| 2015-2017 | Harley-Davidson | FLHTKL Ultra Limited Low | Base |
| 2014-2017 | Harley-Davidson | FLHTKSE CVO Limited | Base |
| 2006-2017 | Harley-Davidson | FLHX Street Glide | Base |
| 2006 | Harley-Davidson | FLHXI Street Glide | Base |
| 2014-2017 | Harley-Davidson | FLHXS Street Glide Special | Base |
| 2010,2015-2017 | Harley-Davidson | FLHXSE CVO Street Glide | Base |
| 2010-2011 | Harley-Davidson | FLHXXX Street Glide Trike | Base |
| 2006 | Harley-Davidson | FLST Heritage Softail | Base |
| 1999-2017 | Harley-Davidson | FLSTC Heritage Softail Classic | Base |
| 2001-2006 | Harley-Davidson | FLSTCI Heritage Softail Classic | Base |
| 1999-2017 | Harley-Davidson | FLSTF Fat Boy | Base |
| 2010-2017 | 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 |
| 2008-2011 | Harley-Davidson | FLSTSB Cross Bones | Base |
| 2005-2007 | Harley-Davidson | FLSTSC Softail Springer Classic | Base |
| 2005-2006 | Harley-Davidson | FLSTSCI Softail Springer Classic | Base |
| 2010 | Harley-Davidson | FLSTSE CVO Softail Convertible | Base |
| 2001-2003 | Harley-Davidson | FLSTSI Heritage Springer | Base |
| 1999-2010,2016 | Harley-Davidson | FLTR Road Glide | Base |
| 2002-2006 | Harley-Davidson | FLTRI Road Glide | Base |
| 2011-2013,2016-2017 | Harley-Davidson | FLTRU Road Glide Ultra | Base |
| 2011,2015-2016 | Harley-Davidson | FLTRUSE CVO Road Glide Ultra | Base |
| 2010-2013 | Harley-Davidson | FLTRX Road Glide Custom | Base |
| 2015-2017 | Harley-Davidson | FLTRXS Road Glide Special | Base |
| 2012 | Harley-Davidson | FLTRXSE CVO Road Glide Custom | Base |
| 2008-2009 | Harley-Davidson | FXCW Rocker | Base |
| 2008-2011 | Harley-Davidson | FXCWC Rocker C | Base |
| 1999-2010 | 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 |
| 1999-2005,2007-2009,2014-2017 | 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 |
| 1999-2008,2010-2017 | Harley-Davidson | FXDWG Dyna Wide Glide | Base |
| 2004-2006 | Harley-Davidson | FXDWGI Dyna Wide Glide | Base |
| 1999-2005 | 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 |
| 1999-2009 | Harley-Davidson | FXSTB Night Train | Base |
| 2001-2006 | Harley-Davidson | FXSTBI Night Train | Base |
| 1999,2007-2010 | Harley-Davidson | FXSTC Softail Custom | Base |
| 2000-2007 | Harley-Davidson | FXSTD Softail Deuce | Base |
| 2001-2006 | Harley-Davidson | FXSTDI Softail Deuce | Base |
| 2003-2004 | Harley-Davidson | FXSTDSE Screamin Eagle Softail Deuce | Base |
| 2001-2006 | Harley-Davidson | FXSTI Softail Standard | Base |
| 1999-2006 | Harley-Davidson | FXSTS Springer Softail | Base |
| 2001-2006 | Harley-Davidson | FXSTSI Springer Softail | Base |
| 2007 | Harley-Davidson | FXSTSSE Screamin Eagle Softail Springer | Base |
| 2009 | Harley-Davidson | FXSTSSE3 CVO Softail Springer | 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
4.3 ★★★★★
Based on 19 reviews
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Product Reviews
★★★★★ 5
Nice so far
Set name: 4.23 Fl Oz
I got this product on a whim. I have severely dry ends that are frayed at this point. Upon initial use, it seems to have made it a bit smoother (I opted for the overnight treatment option). I read a review that said it smells like peanut butter, and I see the potential. Having that in mind it visually reminds me of pure, organic peanut butter; the color and oiliness along with that faint smell really brings it in together. I love how it’s hard to liquid, easy to pick up product and melt to apply. As someone with sensory sensitivity I despise the texture of the oil, but that is a me thing nothing to complain about the actually product. If you are someone who does not like to touch heavy oils, I recommend you find someone else to apply for you, or maybe an entirely different product. I am desperate enough to deal with it.
I just got this last night I will follow up in a few months.
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Reviewed in the United States on April 10, 2026
★★★★★ 5
Recommend
Set name: 4.23 Fl Oz
This My Second Time Buying It, It Really Works For My Daughter Hair
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 20, 2026
★★★★★ 3
Good hair care
Set name: 4.23 Fl Oz
Great smell works great on slow hair growth and thinning
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 11, 2026
★★★★★ 5
Loving it.
Set name: 4.23 Fl Oz, Set name: 4.23 Fl Oz
Hi this is the third brand of bat oil that I’ve purchased and the only reason I purchased this one is cause it also has a shampoo that comes with it. Well, you have to pay for it but it’s a shampoo the same brand anyway I’m in love with the first two and so far it looks like I’m gonna be in love with this third one it pass The field test. It absorbs immediately into your skin when you rub it on it has the coffee smell not as strong as the other two and I see why and I’m not upset about it. It has two additional oils in it where the other two bat oils I have are only batten. The only ingredient is batten oil, but this one has batten oil an American palm, kernal oil and then ELAEIS OLEIFER an kernal oil. And is from Honduras so to me the three important things are it rubs into the your skin and your skin absorbs it easily and it feels good. It’s not sticky. The aroma has the coffee aroma and it’s from Honduras. It doesn’t bother me about the other two oils.
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Reviewed in the United States on April 11, 2025
★★★★★ 4
Batana Oil
Set name: 4.23 Fl Oz
Definitely add shine and leave my girls 4c hair soft and manageable ❤️
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Reviewed in the United States on February 6, 2026