K&N RC-0850 Round Universal Clamp-On Air Filter

The K&N RC-0850 is a reusable round clamp-on air filter for applications that match its listed dimensions. Its small form and washable construction may suit buyers replacing a compatible intake filter, but universal fit does not guarantee fitment on a particular vehicle.

At a glance

Washable and reusable design, with cotton-gauze filter media treated with a tacking agent.
Round shape and universal-fit positioning for a variety of applications.
Manufacturer says it is pre-oiled and ready to install, though the listing also describes drop-in installation into a factory air box, which may not apply to every clamp-on use.

Price

$55.19Save 20%

Reference price: ~~$68.99~~

Price checked: Nov 14, 2026

View offer

Pros and cons

Pros

Reusable construction avoids replacing the filter after each service interval.
Compact listed dimensions help buyers compare it with an existing intake setup.
The manufacturer describes a one-year limited warranty.

Cons

Universal fit is not a vehicle-specific fitment guarantee, so matching the flange and available space is essential.
Cleaning guidance is stated for normal highway driving and may not apply to other driving conditions.

Technical specifications

9 specifications

Identity
Brand	K&N
Model	RC-0850

Dimensions and installation
Form factor	Round
Dimensions listed	2"L x 2.44"W x 2"H
Weight listed	13.6 ounces
Fit type	Universal Fit

Construction and care
Flange material	Molded pliable rubber
Cleaning interval claim	75,000 miles under normal highway driving conditions (5 years based on the average miles driven per year of 15,000 miles)
Warranty claim	1-Year Limited Warranty

What to know before buying

The stated cleaning interval of 75,000 miles or five years is a manufacturer claim limited to normal highway driving. Confirm application fitment and installation requirements before purchase. The listing's clamp-on filter description and reference to dropping into a factory air box do not establish compatibility with every setup.

What’s in the box

Included

2-7/16-inch flange
5-1/8-inch outside diameter
2-inch height

Who is it for?

A good fit for

Drivers or mechanics replacing a small round clamp-on filter whose intake dimensions match the listed size.
Buyers who prefer a washable, reusable filter over a disposable replacement.

Less suited to

Anyone who needs confirmed vehicle-specific fitment without checking intake measurements.
Applications that require a larger filter or a different shape.

K&N RC-0850 Round Universal Clamp-On Air Filter · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.1 / 5 · 40 ratings

5 stars64%64%
4 stars10%10%
3 stars13%13%
2 stars4%4%
1 star9%9%

Customer feedback describes the filter as working well and fitting as expected, and mentions its appearance, including a chrome finish. Reports about quality are mixed, with both favorable and unfavorable impressions. That fit feedback is specific to customers' applications and does not replace checking this model's listed dimensions. Aggregate ratings lean positive overall but include a notable range of lower ratings, so they do not establish consistent results for every installation.

Positive themes

Customers report favorable fit and functionality.
Some feedback praises the appearance, including a chrome finish.

Mixed feedback

Customer comments describe quality in both positive and negative terms.

Frequently asked questions

Will the RC-0850 fit my vehicle?

The listing calls it universal fit but does not name specific vehicles. Compare your intake connection and available space with the listed 2"L x 2.44"W x 2"H dimensions before buying.

Is this filter washable and reusable?

Yes. The manufacturer describes it as washable and reusable, with cotton-gauze media. The stated 75,000-mile cleaning interval applies to normal highway driving.

Does it install directly into a factory air box?

The listing mentions drop-in installation into a factory air box, while identifying this item as a clamp-on filter. Confirm the required installation arrangement for your application.

What warranty is listed?

The feature listing states a 1-Year Limited Warranty. The detailed warranty description says only “LIMITED WARRANTY,” so check the applicable terms.