Product Description
A K&N Dyno test of this RK-series air cleaner assembly on a 2008 Street Bob showed an increase of 6.54 HP@5100 RPM, a 2014 103" Ultra produced an additional 8.33 HP@4670RPM.
The K&N RK-Series air cleaner assemblies are truly stealthy air cleaners since the stock air cleaner cover is re-used. Power increase is realized by replacing the stock filter and backplate.
A special K&N powder coated aluminum backplate, with Dyno-tuned velocity stack, is required to house the oversized K&N air cleaner element. Built-in breathers replace the stock external breathers.
Careful design made it possible to re-fit the stock air cleaner cover for a stock un-touched look.
Note: See 900399 for the replacement air filter element.
Variant: 08-17 Dyna with 29184-08 stock style teardrop air cleaner cover
SKU: A369-802774
MPN: RK-3931
Variant: 13-15 Softail
SKU: A692-807097
MPN: RK-3942
DPN: 904692
Shipping and Delivery Times
All orders are shipped from our warehouse in Falkenberg, Sweden. We work hard to get them moving quickly!
Stock status explained:
- In stock: Ready to ship to you within the time listed. Packages usually arrive 2–4 business days after dispatch depending on your location.
- Sold Out: Currently out of stock at Customhoj, but we expect to have it back soon! Please feel free to contact us for information on when the product will be available again.
If a product has multiple variants (like sizes or colors), the stock status updates automatically as you select your option.
Our goal is simple, to get your order to you as fast as possible!
30-Day Hassle-Free Returns - No Questions Asked
If you are not entirely satisfied with your order, whether you need to change sizes or something else, we offer a full 30-day return policy from the day you receive your order. Return shipping costs apply.
Please note that the right to return does not apply to products that are personalized, or manufactured upon order. See our return policy for complete details and conditions.
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