{"product_id":"k-n-high-flow-universal-clamp-on-air-filter-ru-5111-3-flange-5-75-height-washable-reusable","title":"K\u0026N High-Flow Universal Clamp-On Air Filter RU-5111 — 3\" Flange, 5.75\" Height, Washable Reusable","description":"\u003cp\u003e\u003cstrong\u003eThe K\u0026amp;N High-Flow Original Universal Clamp-On Air Filter (RU-5111) is a washable, reusable cone-style air filter built with premium cotton gauze and a pliable rubber flange to improve airflow and last the life of your vehicle.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis clamp-on K\u0026amp;N filter is designed for broad compatibility and straightforward installation. Its tapered round shape with a 3-inch flange diameter and 5.75-inch overall height fits a wide range of intake setups where increased airflow and longevity are priorities. Pre-oiled from the factory and manufactured in the USA, the RU-5111 replaces disposable paper elements with a serviceable design that minimizes waste and reduces long-term ownership costs.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this filter affect engine airflow and performance?\u003c\/h3\u003e\n\u003cp\u003eThe RU-5111 uses multiple layers of specially treated cotton gauze to allow greater airflow than typical paper filters while still trapping contaminants. By reducing intake restriction, many users notice improved throttle response and consistent performance across a range of operating conditions. It’s not an electronic tune or hardware upgrade, but a direct-flow filter designed to complement your existing intake system.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFour-layer cotton media increases airflow compared with standard paper elements\u003c\/li\u003e\n\u003cli\u003ePre-oiled treatment helps capture particles without reducing flow\u003c\/li\u003e\n\u003cli\u003eTapered design optimizes intake path in cone-style applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat are the build features and maintenance requirements?\u003c\/h3\u003e\n\u003cp\u003eConstruction centers on a molded, flexible rubber flange that resists vibration and seals securely to the intake tube. The filter body is wrapped in multiple layers of high-grade cotton gauze and protected by a durable outer mesh for structural integrity. Maintenance is simple: clean and re-oil the filter when needed rather than replacing it, with typical intervals up to 75,000 miles under normal highway use.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePliable rubber flange (0.75 in length) provides a snug clamp-on attachment\u003c\/li\u003e\n\u003cli\u003eDurable media and mesh hold shape and resist tearing or collapse\u003c\/li\u003e\n\u003cli\u003eCleaning cycle: service approximately every 75,000 miles in normal driving\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill this filter fit my application and how easy is installation?\u003c\/h3\u003e\n\u003cp\u003eThe RU-5111 is a universal clamp-on filter intended for many aftermarket and replacement uses where a 3-inch flange and cone shape are appropriate. Its round tapered form makes it compatible with various intakes, throttle bodies, and short intake tubes; always verify flange diameter and height against your setup before ordering. Installation is typically a quick clamp-on swap — no special tools or permanent modifications required.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFlange diameter: 3.00 in; filter height: 5.75 in\u003c\/li\u003e\n\u003cli\u003eWorks with cone-style intake tubes and many universal intake kits\u003c\/li\u003e\n\u003cli\u003eSimple clamp installation — pre-oiled and ready to install\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow durable and eco-friendly is the K\u0026amp;N RU-5111?\u003c\/h3\u003e\n\u003cp\u003eK\u0026amp;N emphasizes longevity: quality materials and construction are intended to provide service for the life of the vehicle when maintained correctly. Reusable filters reduce disposable air filter waste and the frequency of replacements, which lowers both recurring costs and landfill contribution. The product is backed by a one-year limited warranty and manufactured in the USA for traceable production standards.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eEngineered for long-term use with rugged media and molded flange\u003c\/li\u003e\n\u003cli\u003eReusable design reduces yearly disposable filter waste\u003c\/li\u003e\n\u003cli\u003e1-year limited warranty and made in the USA for quality assurance\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The K\u0026amp;N RU-5111 clamp-on cone filter suits owners wanting a straightforward, serviceable upgrade to increase intake airflow without modifying their engine electronics or intake plumbing. It’s a good fit for hobbyists, DIY mechanics, and drivers who prefer lower lifetime costs and reduced waste compared with disposable filters. Confirm flange size and physical dimensions against your intake before purchase to ensure compatibility.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: How often should I clean the RU-5111?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Under normal highway driving, clean approximately every 75,000 miles; more frequently in dusty conditions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is the RU-5111 compatible with my intake tube?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Measure your intake flange diameter and height; the RU-5111 has a 3.00-inch flange and 5.75-inch height.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"K\u0026N","offers":[{"title":"Default Title","offer_id":48083976454302,"sku":"B000E7DM04","price":68.59,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/k-and-n-ru-5111-front-packaging.jpg?v=1785841975","url":"https:\/\/northtrailauto.ca\/products\/k-n-high-flow-universal-clamp-on-air-filter-ru-5111-3-flange-5-75-height-washable-reusable","provider":"North Trail Auto","version":"1.0","type":"link"}