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Ships within 48 hours · Estimated delivery Sep 18 - Sep 23
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Description
K&N Intake System-Harley Davidson (RK-3910-1)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
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.- Designed to increase horsepower & torque
- Dyno-tuned velocity stack
- Washable and reusable
- Excellent air filtration
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
4.7 ★★★★★
Based on 30 reviews
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Product Reviews
★★★★★ 5
Great buy
Color: A-white Flowers Bf290, Size: Large
This shirt is so soft and comfortable. I went with a large, though my recommended size was an xl. I'm so glad that I read the other reviews and went with large, as this is the perfect size for me. Also, with the right color bra, I don't need an undershirt with this. Which is especially nice considering I wanted a nice, light spring/summer top. I also think that it could easily be dressed up or down depending on what it is paired with. Definitely worth the purchase.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 27, 2026
★★★★★ 5
Beautiful top.
Color: B-turquoise, Size: X-Large
Love this top. Lightweight and soft. Very comfortable. I’m 5’7” and 180 lbs. and I got the XL. I don’t like clingy clothes and this fits perfect. Easy to dress up or down. Would buy again.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 23, 2026
★★★★★ 4
Cute tops!
Color: Blue Floral Sf157, Size: XX-Large
These are comfortable and cute and fit nice. Great for casual or for work. Patterns are really pretty and colorful.
Order up 2 sizes these run very small.
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Reviewed in the United States on April 27, 2026
★★★★★ 5
Very nice. Runs small
Color: A-white Flowers Bf290, Size: 3X-Large
You’re beautiful shirt! The fabric is soft and very comfortable to wear. My only concern is that I find it runs small to size. I ordered one and then I ordered one a larger size and that fits better. I received many compliments on this shirt. I recommend this shirt for its comfort.
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Reviewed in the United States on May 9, 2026
★★★★★ 5
Stripes
Color: Multicolor-cx289, Size: 3X-Large
True to size. Material is as described and colors are bright but no gaudy.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 29, 2026
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