--- product_id: 510768839 title: "K&N Universal Clamp-On Air Filter: High Performance, Premium, Washable, Replacement Filter: Flange Diameter: 3.5 In, Filter Height: 5.5 In, Flange Length: 0.75 In, Shape: Oval Tapered, RU-5040" brand: "k&n" price: "¥25896" currency: JPY in_stock: true reviews_count: 5 category: "K&N" url: https://www.desertcart.jp/products/510768839-k-and-n-universal-clamp-on-air-filter-high-performance store_origin: JP region: Japan --- # 50% more airflow Clamp-on easy install Washable & reusable K&N Universal Clamp-On Air Filter: High Performance, Premium, Washable, Replacement Filter: Flange Diameter: 3.5 In, Filter Height: 5.5 In, Flange Length: 0.75 In, Shape: Oval Tapered, RU-5040 **Brand:** k&n **Price:** ¥25896 **Availability:** ✅ In Stock ## Summary > 💨 Power your ride, save the planet, and join the elite airflow club! ## Quick Answers - **What is this?** K&N Universal Clamp-On Air Filter: High Performance, Premium, Washable, Replacement Filter: Flange Diameter: 3.5 In, Filter Height: 5.5 In, Flange Length: 0.75 In, Shape: Oval Tapered, RU-5040 by k&n - **How much does it cost?** ¥25896 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/510768839-k-and-n-universal-clamp-on-air-filter-high-performance) ## 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 - • **Eco-Champion:** Washable and reusable to reduce waste and protect the planet - • **Effortless Upgrade:** Pre-oiled, clamp-on design for a quick, tool-free install - • **Unleash Engine Power:** Boost acceleration with 50% increased airflow over paper filters - • **Save Big, Drive Smart:** Save $250 over 10 years by ditching disposable filters - • **Race-Proven Reliability:** NASCAR official air filter trusted for peak performance ## Overview The K&N Universal Clamp-On Air Filter (RU-5040) is a premium, washable, and reusable high-flow filter engineered to increase engine airflow by up to 50%, enhancing power and acceleration. Featuring a universal clamp-on design with a 3.5-inch flange diameter and durable oval tapered shape, it offers easy installation and long-lasting performance with up to 50,000 miles between cleanings. Trusted by NASCAR and made in America, this filter saves money over disposable alternatives while reducing environmental impact. ## 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 up to 50%. 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. Review: 2013 BMW N55 f10 - Work perfectly fine for me. 2013 BMW N55 f10 Review: Sucks in the right way. - Changed my life. It sucks so much air I can barely keep my socks on. 10/10 would recommend. ## 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 ns. - 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 contamits..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..NO-HASSLE WARRANTY: 1-Year Limited Warranty ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B09BDD8H39 | | Automotive Fit Type | Universal Fit | | Brand | K&N | | Brand Name | K&N | | Customer Reviews | 4.7 out of 5 stars 19 Reviews | | Fit Type | Universal Fit | | Fit type | Universal Fit | | Included Components | Air Filter^Hose Clamp | | Item Dimensions L x W x H | 21.3L x 21.1W x 21.8H centimeters | | Item Type Name | Universal Clamp-On Air Filter | | Manufacturer | K&N Engineering, Inc. | | Manufacturer Part Number | RU-5040 | | Model Number | RU-5040 | | Number of Items | 1 | | OEM Equivalent Part Number | RU-5040 | | OEM part number | RU-5040 | | Product Grade | Replacement Part | | Product dimensions | 21.3L x 21.1W x 21.8H centimeters | | Product grade | Replacement Part | | Shape | Round | | UPC | 024844386199 | | Unit Count | 1 Count | ## Product Details - **Brand:** K&N - **Fit type:** Universal Fit - **OEM part number:** RU-5040 - **Product dimensions:** 21.3L x 21.1W x 21.8H centimeters - **Product grade:** Replacement Part ## Images ![K&N Universal Clamp-On Air Filter: High Performance, Premium, Washable, Replacement Filter: Flange Diameter: 3.5 In, Filter Height: 5.5 In, Flange Length: 0.75 In, Shape: Oval Tapered, RU-5040 - Image 1](https://m.media-amazon.com/images/I/71Nq4P6bbVL.jpg) ![K&N Universal Clamp-On Air Filter: High Performance, Premium, Washable, Replacement Filter: Flange Diameter: 3.5 In, Filter Height: 5.5 In, Flange Length: 0.75 In, Shape: Oval Tapered, RU-5040 - Image 2](https://m.media-amazon.com/images/I/519878XNi9L.jpg) ![K&N Universal Clamp-On Air Filter: High Performance, Premium, Washable, Replacement Filter: Flange Diameter: 3.5 In, Filter Height: 5.5 In, Flange Length: 0.75 In, Shape: Oval Tapered, RU-5040 - Image 3](https://m.media-amazon.com/images/I/81CWRM1Dd8L.jpg) ![K&N Universal Clamp-On Air Filter: High Performance, Premium, Washable, Replacement Filter: Flange Diameter: 3.5 In, Filter Height: 5.5 In, Flange Length: 0.75 In, Shape: Oval Tapered, RU-5040 - Image 4](https://m.media-amazon.com/images/I/810EjNHr6lL.jpg) ![K&N Universal Clamp-On Air Filter: High Performance, Premium, Washable, Replacement Filter: Flange Diameter: 3.5 In, Filter Height: 5.5 In, Flange Length: 0.75 In, Shape: Oval Tapered, RU-5040 - Image 5](https://m.media-amazon.com/images/I/81GN3d2MHBL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ 2013 BMW N55 f10 *by J***Y on 22 April 2026* Work perfectly fine for me. 2013 BMW N55 f10 ### ⭐⭐⭐⭐⭐ Sucks in the right way. *by G***R on 7 December 2025* Changed my life. It sucks so much air I can barely keep my socks on. 10/10 would recommend. ### ⭐⭐⭐⭐⭐ Good product *by L***N on 24 April 2025* Works perfect, good price.. ## Frequently Bought Together - K&N High-Flow Original Lifetime Universal Clamp-On Air Filter: High Performance, Premium, Washable: Flange Diameter: 3.5 In, Filter Height: 5.5 In, Flange Length: 0.75 In, Shape: Oval Tapered, RU-5040 - Ucreative 90 Degree Elbow ID: 3.5"(89mm) 4-Ply High Performance Coupler Silicone Hose for Vehicle with T-Bolt Clamp - Mishimoto MMCP-3035BK 3" to 3.5" Silicone Transition Coupler, Black --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.jp/products/510768839-k-and-n-universal-clamp-on-air-filter-high-performance](https://www.desertcart.jp/products/510768839-k-and-n-universal-clamp-on-air-filter-high-performance) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-06-19*