---
product_id: 26757583
title: "K&N High-Flow Original Lifetime Universal Clamp-On Air Filter: High Performance, Premium, Washable: Flange Diameter: 4.5 In, Filter Height: 6 In, Flange Length: 0.625 In, Shape: Round Tapered, RU-4740"
brand: "k&n"
price: "€ 118.34"
currency: EUR
in_stock: true
url: https://www.desertcart.it/products/26757583-k-and-n-high-flow-original-lifetime-universal-clamp-on
store_origin: IT
region: Italy
---

# Boosts horsepower & acceleration Washable & reusable for lifetime use 4-layer premium cotton gauze filtration K&N High-Flow Original Lifetime Universal Clamp-On Air Filter: High Performance, Premium, Washable: Flange Diameter: 4.5 In, Filter Height: 6 In, Flange Length: 0.625 In, Shape: Round Tapered, RU-4740

**Brand:** k&n
**Price:** € 118.34
**Availability:** ✅ In Stock

## Summary

> ♻️ Power, Protection, and Performance — All in One Filter!

## Quick Answers

- **What is this?** K&N High-Flow Original Lifetime Universal Clamp-On Air Filter: High Performance, Premium, Washable: Flange Diameter: 4.5 In, Filter Height: 6 In, Flange Length: 0.625 In, Shape: Round Tapered, RU-4740 by k&n
- **How much does it cost?** € 118.34 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.it](https://www.desertcart.it/products/26757583-k-and-n-high-flow-original-lifetime-universal-clamp-on)

## Best For

- k&n enthusiasts

## Why This Product

- Trusted k&n brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Quad-Layer Defense:** Four premium cotton gauze layers trap harmful contaminants with precision.
- • **Lifetime Durability:** Built with rugged materials and advanced construction to last your vehicle’s lifetime.
- • **Eco-Friendly Upgrade:** Reusable design reduces landfill waste while saving you money on replacements.
- • **Unleash Engine Power:** State-of-the-art media increases airflow for noticeable horsepower gains.
- • **Effortless Maintenance:** Clean only once every 5 years or 75,000 miles—performance that keeps up with you.

## Overview

The K&N High-Flow Original Lifetime Universal Clamp-On Air Filter (RU-4740) is a premium, washable air filter engineered to boost engine horsepower and acceleration. Featuring four layers of cotton gauze filtration, it traps contaminants effectively while offering rugged durability designed to last the lifetime of your vehicle. With universal fitment and minimal maintenance required (clean every 75,000 miles), this eco-friendly filter is a smart upgrade for professionals seeking reliable performance and sustainability.

## Description

K&N Universal Clamp-on Air Filters are manufactured for a wide variety of applications and unique filtration needs. K&N performance High-Flow Air Filters are engineered to improve engine performance by increasing airflow. Unlike disposable paper filters which must be frequently replaced, K&N Air Filters are washable, reusable, and engineered to last for the life of your vehicle. These versatile filters are constructed with ultra-strong molded pliable rubber flanges that absorb vibration and allow for secure attachment. Available in round, tapered (cone-style), and oval designs, K&N offers thousands of clamp-on filters in a multitude of shapes and sizes that cater to many precise applications. Join the millions of customers who have saved money and improved vehicle performance by upgrading to K&N filtration.

## Features

- ENGINEERED POWER: State-of-the-art air filter media is designed to increase horsepower and acceleration as well as improve overall engine performance
- 4 LAYERS OF PROTECTION: Multiple layers of premium cotton gauze treated with a specially-designed tacking agent work together to create an intricate mesh of engine filter media that is designed to block and trap harmful contaminants
- RUGGED CONSTRUCTION: K&N Universal Air Filters are manufactured with durable, premium materials and state-of-the-art construction methods to last a lifetime
- CLEAN ONCE EVERY 5 YEARS: Engine air filter only needs cleaning every 75,000 miles under normal highway driving conditions (5 years based on the average miles driven per year of 15,000 miles)
- EASY INSTALLATION: K&N Air Filters are pre-oiled and ready to drop into your factory air box- they are one of the easiest and most cost-effective vehicle upgrades for quick performance gains
- UNIVERSAL FITMENT: Designed for use on a variety of applications
- REDUCES WASTE: Over 200 million disposable air filters and their packaging waste wind up in landfills each year- reusable filters help reduce waste in our landfills
- NO-HASSLE WARRANTY: 1-Year Limited Warranty
- MADE IN USA: K&N Air Filters are proudly made in the USA for trusted quality & reliability

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | K&N |
| Product Dimensions | 4.5"L x 4.5"W x 6"H |
| OEM Part Number | RU-4740 |
| Global Trade Identification Number | 00024844102119 |
| Shape | Round |
| Manufacturer | K&N Engineering |
| Automotive Fit Type | Universal Fit |
| UPC | 400770084505 024844102119 |
| Model | Universal Clamp-On Air Filter |
| Item Weight | 1 pounds |
| Item model number | RU-4740 |
| Is Discontinued By Manufacturer | No |
| Exterior | Other |
| Manufacturer Part Number | RU-4740 |
| Position | Left |

## Product Details

- **Brand:** K&N
- **Product Dimensions:** 4.5"L x 4.5"W x 6"H
- **OEM Part Number:** RU-4740
- **Global Trade Identification Number:** 00024844102119
- **Shape:** Round

## Images

![K&N High-Flow Original Lifetime Universal Clamp-On Air Filter: High Performance, Premium, Washable: Flange Diameter: 4.5 In, Filter Height: 6 In, Flange Length: 0.625 In, Shape: Round Tapered, RU-4740 - Image 1](https://m.media-amazon.com/images/I/71aTOujS0gL.jpg)
![K&N High-Flow Original Lifetime Universal Clamp-On Air Filter: High Performance, Premium, Washable: Flange Diameter: 4.5 In, Filter Height: 6 In, Flange Length: 0.625 In, Shape: Round Tapered, RU-4740 - Image 2](https://m.media-amazon.com/images/I/51XOEpGWEDL.jpg)
![K&N High-Flow Original Lifetime Universal Clamp-On Air Filter: High Performance, Premium, Washable: Flange Diameter: 4.5 In, Filter Height: 6 In, Flange Length: 0.625 In, Shape: Round Tapered, RU-4740 - Image 3](https://m.media-amazon.com/images/I/81ZYjdRkeZL.jpg)
![K&N High-Flow Original Lifetime Universal Clamp-On Air Filter: High Performance, Premium, Washable: Flange Diameter: 4.5 In, Filter Height: 6 In, Flange Length: 0.625 In, Shape: Round Tapered, RU-4740 - Image 4](https://m.media-amazon.com/images/I/81UNOdmm88L.jpg)
![K&N High-Flow Original Lifetime Universal Clamp-On Air Filter: High Performance, Premium, Washable: Flange Diameter: 4.5 In, Filter Height: 6 In, Flange Length: 0.625 In, Shape: Round Tapered, RU-4740 - Image 5](https://m.media-amazon.com/images/I/81az21wucmL.jpg)

## Questions & Answers

**Q: What is the ID is 4.5 inches correct**
A: Clamp side is 4.5 inch

**Q: How long is the filter?**
A: 6 inches.

## Frequently Bought Together

- K&N High-Flow Original Lifetime Universal Clamp-On Air Filter: High Performance, Premium, Washable: Flange Diameter: 4.5 In, Filter Height: 6 In, Flange Length: 0.625 In, Shape: Round Tapered, RU-4740
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*Product available on Desertcart Italy*
*Store origin: IT*
*Last updated: 2026-03-21*