---
product_id: 52664703
title: "Universal Clamp-On Air Filter: High Performance, Premium, Washable, Replacement Filter: Flange Diameter: 4 In, Filter Height: 5 In, Flange Length: 1.125 In, Shape: Round Tapered, RG-1001RD"
brand: "k&n"
price: "¥17057"
currency: JPY
in_stock: true
category: "K&N"
url: https://www.desertcart.jp/products/52664703-universal-clamp-on-air-filter-high-performance-premium-washable-replacement
store_origin: JP
region: Japan
---

# 50% more airflow Clamp-on easy install Washable & reusable Universal Clamp-On Air Filter: High Performance, Premium, Washable, Replacement Filter: Flange Diameter: 4 In, Filter Height: 5 In, Flange Length: 1.125 In, Shape: Round Tapered, RG-1001RD

**Brand:** k&n
**Price:** ¥17057
**Availability:** ✅ In Stock

## Summary

> 💨 Unlock your engine’s hidden horsepower with K&N’s universal clamp-on filter!

## Quick Answers

- **What is this?** Universal Clamp-On Air Filter: High Performance, Premium, Washable, Replacement Filter: Flange Diameter: 4 In, Filter Height: 5 In, Flange Length: 1.125 In, Shape: Round Tapered, RG-1001RD by k&n
- **How much does it cost?** ¥17057 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/52664703-universal-clamp-on-air-filter-high-performance-premium-washable-replacement)

## 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

- • **Effortless Upgrade:** Pre-oiled, clamp-on design makes installation a breeze—no mechanic needed.
- • **Eco-Champion Filter:** Washable and reusable, reducing waste while protecting your engine.
- • **Save Big, Drive Smart:** Save $250 over 10 years by ditching disposable filters for this reusable powerhouse.
- • **Boost Your Ride's Power:** Up to 50% more airflow for enhanced acceleration and throttle response.
- • **Race-Proven Reliability:** Official NASCAR air filter—engineered for peak performance and ultimate protection.

## Overview

The K&N Universal Clamp-On Air Filter (RG-1001RD) is a premium, washable, and reusable round tapered filter designed for universal fit with a 4-inch flange diameter. Engineered to deliver up to 50% more airflow than standard paper filters, it boosts vehicle power and acceleration while protecting the engine from contaminants. Featuring a simple clamp-on installation and a low-maintenance design that lasts up to 50,000 miles before cleaning, this American-made filter saves money and reduces waste. Trusted by NASCAR, it’s the ultimate upgrade for performance-driven drivers.

## Description

K&N Universal Clamp-On Air Filter: High Performance, Premium, Washable, Replacement Filter: Flange Diameter: 4 In, Filter Height: 5 In, Flange Length: 1.125 In, Shape: Round Tapered, RG-1001RD : desertcart.co.uk: Business, Industry & Science

## Features

- ENGINEERED POWER: State-of-the-art filtration media provides up to 50% more airflow than disposable paper filters to increase power and acceleration. Clogged or dirty air filters can reduce your vehicle’s acceleration by up to 10%.
- EASY INSTALLATION: Pre-oiled and built with simple clamp-on design. One of the easiest and most cost-effective upgrades for your vehicle for quick performance gains.
- SAVES MONEY: K&N high-flow replacement air filters will save you $250 over 10 years by avoiding disposable filters.
- ECO-FRIENDLY: Using a washable, reusable product helps reduce replacement waste. A K&N filter will last longer than 10 disposable filters.
- WORLD CLASS PROTECTION: Pushing the limits of engine protection by protecting your engine from harmful contaminants.
- LOW-MAINTENANCE DESIGN: 50,000 miles before your first cleaning under normal highway driving conditions.
- HIGH QUALITY: Made in America.
- RACE TESTED: The Official Air Filter of NASCAR. Trusted on the racetrack—made for your vehicle.
- Die Fahrzeuge für die dieses Produkt geeignet ist finden Sie in der Produktbeschreibung.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00AFRIVNQ |
| Automotive Fit Type | Universal Fit |
| Best Sellers Rank | 82,396 in Automotive ( See Top 100 in Automotive ) 646 in Car Air Engine Air Filters |
| Brand Name | K&N |
| Customer Reviews | 4.6 4.6 out of 5 stars (5,052) |
| EU Spare Part Availability Duration | 1 Years |
| Fit Type | Universal Fit |
| Global Trade Identification Number | 00024844313317 |
| Item Dimensions L x W x H | 15.2L x 15.2W x 16.9H centimetres |
| Item Shape | Round |
| Item Type Name | K&N RG-Serie Universal air-Filter with 3 Installation diameters Red (RG-1001RD) |
| Item Weight | 0.3 Kilograms |
| Manufacturer | KN Filters Inc. |
| Manufacturer Part Number | RG-1001RD |
| Manufacturer Warranty Description | 12 Months |
| Model Number | RG-1001RD |
| Number of Items | 1 |
| Number of Packs | 1 |
| OEM Equivalent Part Number | RG-1001RD |
| Product Grade | Replacement Part |
| UPC | 024844313317 |
| Unit Count | 1.0 count |

## Product Details

- **Brand:** K&N
- **EU Spare Part Availability Duration:** 1 Years
- **Fit type:** Universal Fit
- **Product dimensions:** 15.2L x 15.2W x 16.9H centimetres
- **Product grade:** Replacement Part

## Images

![Universal Clamp-On Air Filter: High Performance, Premium, Washable, Replacement Filter: Flange Diameter: 4 In, Filter Height: 5 In, Flange Length: 1.125 In, Shape: Round Tapered, RG-1001RD - Image 1](https://m.media-amazon.com/images/I/81fmmwwrPCL.jpg)

## Available Options

This product comes in different **Style** options.

## Questions & Answers

**Q: Once air box is removed, where does the sensor thats on the air box go?**
A: If you are upgrading a standard air box as well as the filter you will need an inlet pipe and the sensor would insert along this pipe.

**Q: Well this fit 07 focus**
A: Yes with reducers

**Q: Does this come with adapter clips?**
A: it comes with 3 option reducers for various intake pipe diameters ( if you need to know what these are i'm pretty sure I saw them online).

**Q: Will this fit 2009 Mk2 focus tdci please?**
A: Just measure the diameter of the inlet pipe to which the filter will be fitted, then make sure that's the same or less than the maximum diameter of the filter's fitting.

## Frequently Bought Together

- K&N High-Flow Original Lifetime Universal Clamp-On Air Filter: High Performance, Premium: Flange Diameter: 4 In, Filter Height: 5.5 In, Flange Length: 1.125 In, Shape: Round Tapered, RG-1001RD
- TCMI Air Filter Cover for Car Cold Air Intake Filter Cover Wrap Dustproof, Air Intake Filter Sock Cover for Harley Touring, Universal for High Flow Air Intake Filters (S)
- K&N Air Filter Cleaning Kit: Aerosol Filter Cleaner and Oil Kit; Restores Engine Air Filter Performance; Service Kit-99-5000, Multi

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-09-14*