K&N RU-3135HBK Dryflow Universal Clamp-On Air Filter

Universal: The K&N RU-3135HBK Dryflow air filter is a washable, oil-free synthetic clamp-on replacement filter. Its listed measurements are useful for checking space and fit, but confirm the inlet connection against your intake before buying.

At a glance

Washable synthetic media is intended to be cleaned and reused.
The oil-free design avoids applying filter oil during maintenance.
The listing describes the filter as universal fit, but application fit still depends on matching the intake connection and available space.

Price

$55.19Save 20%

Reference price: ~~$68.99~~

Price checked: Nov 14, 2026

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Pros and cons

Pros

Reusable media can be washed when dirty, according to the listing.
Oil-free synthetic construction simplifies routine servicing compared with an oil-treated filter.
The listed product dimensions help buyers assess clearance before purchase.

Technical specifications

9 specifications

Identity
Brand	K&N
Model	RU-3135HBK
Product grade	Replacement Part
Fit type	Universal Fit

Dimensions and installation
Dimensions listed	7.38"L x 7.38"W x 10.75"H

Media and maintenance
Filter media	Dry synthetic
Media color	Black
Maintenance	Washable and reusable
Oil requirement	Oil-free

What to know before buying

Listing details to confirm

The title lists a 5-inch flange diameter, 7-inch filter height, and 1-inch flange length, while the details section gives overall dimensions of 7.38"L x 7.38"W x 10.75"H. These are different measurement descriptions, so confirm the required connection size and clearance for your application. The listing says to clean dirty media with K&N synthetic air filter cleaner.

What’s in the box

Included

1 air filter

Who is it for?

A good fit for

Drivers replacing a clamp-on intake filter who can match the connection and clearance to the listed measurements.
Buyers who prefer washable, reusable, oil-free filter media.

Less suited to

Buyers who need a vehicle-specific fit confirmation or exact inlet dimensions not established by the supplied listing.

K&N RU-3135HBK Dryflow Universal Clamp-On Air Filter · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.6 / 5 · 14 ratings

5 stars80%80%
4 stars10%10%
3 stars0%0%
2 stars10%10%
1 star0%0%

Aggregate ratings lean positive, with most ratings in the highest category, but a smaller portion are low. Without written feedback, the ratings do not establish why customers were satisfied or dissatisfied. Buyers should judge fit by the listed connection and overall dimensions, rather than treating ratings as fit confirmation.

Frequently asked questions

Is the RU-3135HBK filter washable?

Yes. The listing describes it as washable and reusable, and says to clean dirty media with K&N synthetic air filter cleaner.

Does this filter require oil?

The listing describes the synthetic media as oil-free.

Will it fit any vehicle labeled universal?

Universal fit is the listing's fit designation, not confirmation for every vehicle. Match the intake connection and available clearance to your setup before buying.

What dimensions should I use to check fit?

The details list overall dimensions of 7.38"L x 7.38"W x 10.75"H. The title separately gives a 5-inch flange diameter, 7-inch filter height, and 1-inch flange length, so verify the needed measurements for your installation.