K&N Engineering

K&N Unique Air Filter - Replacement Element for RK-3931

$83.99
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Description

The K&N replacement air filter for RK Series air cleaner assemblies is designed to increase horsepower and acceleration while providing excellent filtration. The air filter is washable and reusable and designed to be used as a replacement air filter for specific K&N RK Series air cleaner assemblies for Harley-Davidson® motorcycles. The air filter is covered by the famous K&N Million-Mile Limited Warranty.

  • Replacement air filter for specific RK Series air cleaner assemblies.
  • High air flow filter media provides exceptional filtration
  • Designed to boost horsepower and rate of acceleration
  • Million Mile Limited Warranty®
  • Washable and reusable

FAQ

How long does shipping take?


Most orders ship within 1–2 business days. Engines and oversized items may require additional handling time. You’ll receive tracking as soon as your order leaves our warehouse.

What happens if an item is backordered?


If a product is backordered, we’ll notify you right away with an estimated restock date. You can choose to wait, swap, or cancel.

How do I track my order?


Once your order ships, you’ll receive an email with tracking information. You can also log into your account anytime to check order status.


We’ve been in your shoes. From first bolt-ons to full custom builds, our crew can guide you the right way.


Every product we sell is chosen with one goal in mind: helping you build faster, stronger, and more reliable machines.


We team up with the best brands so you can build with confidence.

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