Description
Product Overview
The K&N KN-401 high flow oil filter is engineered for street‑sport motorcycles that demand both performance and reliability. Constructed from a synthetic‑blend fiber media housed in a machined steel/aluminum canister, this filter delivers a consistent oil flow while capturing harmful particles. With an outside diameter of 3 inches and a 17mm thread, it fits the OEM specification for a seamless replacement. The filter’s lightweight design (3.2 ounces) and compact dimensions (3.2 x 3.1 x 2.8 inches) make it easy to install without compromising durability.
![[Product front view showing all components]](https://www.wenex.store/wp-content/uploads/2026/06/9674bad5475b4e16b11c3771905ab8f5.jpg)
Usage
Designed for street‑sport and performance motorcycles, the KN-401 excels in high‑rev environments where oil flow is critical. Whether you’re navigating city traffic or hitting the track, this filter maintains optimal oil pressure and protects engine components from wear. It works with all synthetic, conventional, and blended motor oils, making it a versatile choice for daily riders and enthusiasts alike.
Why Choose Us
K&N’s reputation for high‑quality filtration is backed by rigorous laboratory testing that verifies capacity and burst strength. The heavy‑duty construction ensures the canister resists deformation under pressure, while the synthetic‑blend media removes a high percentage of contaminants. Each filter is backed by a 1‑year limited warranty and supported by K&N’s dedicated customer service team, providing peace of mind for every purchase.
Key Features
- High flow design maintains optimal oil pressure for aggressive riding.
- Synthetic‑blend media captures fine particles, extending engine life.
- Heavy‑duty steel/aluminum canister resists deformation and wear.
- Universal compatibility with synthetic, conventional, and blended oils.
- 1‑year limited warranty and responsive K&N customer support.
FAQ
What size thread does the KN-401 use?
The filter features a 17mm thread, matching the OEM specification for most street‑sport motorcycles.
Can I use this filter with conventional oil?
Yes, the KN-401 is compatible with synthetic, conventional, and blended motor oils.
How often should I replace the filter?
K&N recommends replacement every 3,000 to 5,000 miles, or according to your motorcycle manufacturer’s service interval.
Is the filter easy to install?
Installation is straightforward with a wrench‑off design that allows quick removal and replacement.
What warranty does K&N provide?
The filter comes with a 1‑year limited warranty covering defects in material and workmanship.







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