# K&N RU-3113HBK Dryflow Universal Clamp-On Air Filter, 4-In Flange

The K&N RU-3113HBK Dryflow universal clamp-on air filter uses black, oil-free synthetic media and is described as washable and reusable. Its listed 4-inch flange and 6-inch filter height make fit dimensions the key check before purchase.

- [Original product page](https://best-deals.pro/product/kn-ru-3113hbk-dryflow-universal-clamp-on-air-filter)
- [View offer](https://best-deals.pro/visit/kn-ru-3113hbk-dryflow-universal-clamp-on-air-filter)
- Market: US
- Language: en-US
- Currency: USD
- Brand: K&N
- Model: RU-3113HBK
- Category: Cars & Motorcycles > Auto Parts & Maintenance > Mechanical Parts
- Price: 55.19 USD
- Previous price: 68.99 USD
- Discount: 20%
- Price checked: 2026-11-14T05:36:18.585Z
- Rating: 4.6 / 5
- Reviews: 12

Prices and deal status are the latest recorded data, not a guarantee of availability. Confirm the price and availability with the store.

## At a glance

- Dry, oil-free synthetic media in black.
- The filter is described as washable and reusable, with K&N synthetic air filter cleaner specified for washing when dirty.
- The listed flange diameter is 4 inches, with a 6-inch filter height and 1.75-inch flange length.

## Pros

- Oil-free media avoids an oiling step in the stated care description.
- Washable and reusable construction allows cleaning rather than routine replacement, subject to suitable cleaning and fit.

## Specifications

### Identity
- Brand: K&N
- Model: RU-3113HBK
- Product type: Universal Clamp-On Air Filter
- Fit type: Universal Fit
- Product grade: Replacement Part
### Construction and dimensions
- Media type: Dry Synthetic
- Filter media: Black synthetic media
- Flange diameter: 4 In
- Filter height: 6 In
- Flange length: 1.75 In
### Care and contents
- Cleaning: Washable and reusable
- Oil treatment: Oil-free air filter
- Included components: 1 Air Filter
- Number of items: 1
### Warranty
- Manufacturer warranty description: 1 Year Limited

## Before you buy

- The listing title includes the token RC-3113HBK, while the model and OEM part number fields identify RU-3113HBK. Confirm the exact part number and dimensions against the intended intake before ordering.

## In the box

- 1 air filter (Included)

## A good fit for

- Buyers seeking a washable, oil-free synthetic clamp-on filter whose intake matches the listed 4-inch flange, 6-inch height and 1.75-inch flange length.
- Owners who prefer a reusable filter and can clean it when dirty using the specified K&N synthetic air filter cleaner.

## Less suited to

- Buyers needing a vehicle-specific fit confirmation, since the listing gives a universal-fit designation rather than vehicle applications.
- Buyers whose intake dimensions do not match the listed flange size and filter dimensions.

## Customer feedback

The supplied evidence contains aggregate ratings but no review-summary text, so it does not establish why customers rated the filter as they did. The distribution is mostly in the highest rating category, with a small one-star share. That provides limited overall sentiment context, not evidence about fit, filtration or cleaning performance for a particular setup.

## Frequently asked questions

### What are the listed dimensions?
The listing gives a 4-inch flange diameter, 6-inch filter height and 1.75-inch flange length. Compare these with the intake connection and available clearance.
### Does this filter need oil?
It is described as an oil-free filter with dry synthetic media.
### How is the filter cleaned?
The listing says it can be washed when dirty and specifies K&N synthetic air filter cleaner.
### Which part number should I confirm?
The title contains RC-3113HBK, but the model and OEM part number fields say RU-3113HBK. Confirm the exact part identity with the selected listing before buying.

## Alternative options

- [K&N Dryflow Lifetime Universal Clamp-On Air Filter: Dry Synthetic, Washable, Oil-Free: Flange Diameter: 4 In, Filter Height: 9 In, Flange Length: 1.5 In, Type: Dry Synthetic, RU-3112HBK](https://best-deals.pro/visit/kn-ru-3113hbk-dryflow-universal-clamp-on-air-filter)
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## Add-ons

- [Spectre Performance 9781 Black 4" 90 Degree Boot](https://best-deals.pro/visit/kn-ru-3113hbk-dryflow-universal-clamp-on-air-filter)

## Images

![K&N RU-3113HBK Dryflow Universal Clamp-On Air Filter, 4-In Flange — 1](https://best-deals.pro/i/zM2rVbXu0PasmvqwI8ipXEADFdKDThMLzGYlTdRjdR5OebcziJtQgDlC3oNgSqGMkGgB9X7AG4vaj0Zq1WVxNW4mn32L0pk6YfswsjSaaXKZn7g3desmcHt1.jpg)