{"product_id":"k-n-high-flow-clamp-on-universal-air-filter-ru-3580-3-flange-5-height-washable-performance","title":"K\u0026N High-Flow Clamp-On Universal Air Filter RU-3580 — 3\" Flange, 5\" Height, Washable Performance","description":"\u003cp\u003e\u003cstrong\u003eThe K\u0026amp;N High-Flow Original Lifetime Universal Clamp-On Air Filter (RU-3580) is a washable, reusable cone-style filter engineered to increase airflow and provide long-term filtration for a wide range of engines.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis clamp-on air filter pairs K\u0026amp;N’s multi-layer cotton gauze media with a pliable molded rubber flange, delivering improved airflow, durable fitment, and a reusable design that replaces disposable paper filters. With a 3-inch flange diameter, 1.75-inch flange length and a 5-inch filter height, the RU-3580 is a tapered round filter suited for many intake applications where space and secure connection matter.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this filter improve performance without frequent replacements?\u003c\/h3\u003e\n\u003cp\u003eThe RU-3580 uses four layers of premium cotton gauze treated with a tackifying agent to trap contaminants while allowing greater air volume than typical paper elements. Increased airflow can help engines breathe more easily, supporting stronger throttle response and potential gains in horsepower and acceleration.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMulti-layer cotton gauze for effective filtration with high airflow\u003c\/li\u003e\n  \u003cli\u003ePre-oiled and ready to install—no break-in required\u003c\/li\u003e\n  \u003cli\u003eWashable and reusable for the life of the vehicle, reducing replacement frequency\u003c\/li\u003e\n  \u003cli\u003eDesigned to balance filtration efficiency and airflow for performance applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat are the physical dimensions and fitment features I should know?\u003c\/h3\u003e\n\u003cp\u003ePhysically the RU-3580 is a tapered (cone) round filter with a 3-inch flange inside diameter, 1.75-inch flange length and a 5-inch overall height—dimensions that suit many universal clamp-on installations. The flange is molded from pliable rubber to absorb vibration and create a secure seal when used with a hose clamp or intake pipe.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e3.00 in flange diameter for common intake tubes and adapters\u003c\/li\u003e\n  \u003cli\u003e1.75 in flange length to accommodate clamping and angled connections\u003c\/li\u003e\n  \u003cli\u003e5.00 in filter height for compact engine bays or custom setups\u003c\/li\u003e\n  \u003cli\u003eRound tapered shape fits cone-style and many custom airbox designs\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do I care for and maintain this reusable air filter?\u003c\/h3\u003e\n\u003cp\u003eUnlike disposable filters, the K\u0026amp;N RU-3580 is designed to be cleaned and re-oiled, extending service life and cutting long-term costs. Under normal highway driving, K\u0026amp;N recommends cleaning approximately every 75,000 miles, though severe or dusty conditions may require more frequent attention.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003ePre-oiled from the factory—install right away\u003c\/li\u003e\n  \u003cli\u003eClean using K\u0026amp;N cleaner and re-oil kit following manufacturer instructions\u003c\/li\u003e\n  \u003cli\u003eTypical highway interval: clean every 75,000 miles; adjust for harsh environments\u003c\/li\u003e\n  \u003cli\u003eReusable design reduces recurring filter purchases and landfill waste\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIs this filter durable and backed by warranty?\u003c\/h3\u003e\n\u003cp\u003eThe RU-3580 is built with rugged materials—premium cotton media, protective oil treatment, and a robust molded rubber flange—intended for long-term use. It comes with a 1-year limited warranty and is made in the USA, reflecting K\u0026amp;N’s production standards and quality control.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDurable construction for lifetime use when properly maintained\u003c\/li\u003e\n  \u003cli\u003e1-Year limited warranty for manufacturing coverage\u003c\/li\u003e\n  \u003cli\u003eMade in the USA to K\u0026amp;N quality specifications\u003c\/li\u003e\n  \u003cli\u003eReduces landfill waste by replacing disposable filters\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The K\u0026amp;N RU-3580 clamp-on air filter is aimed at car, truck, motorcycle, and powersports owners who want a versatile, performance-minded replacement for disposable filters—especially those doing custom intake work or seeking durable, reusable filtration. It’s a practical upgrade for DIY mechanics, performance enthusiasts, and anyone looking to lower long-term maintenance costs while keeping solid airflow and protection for their engine.\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: Will this fit a 3-inch intake tube?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The RU-3580 has a 3.00-inch flange diameter and clamps securely to most 3-inch intake tubes.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: How often does the filter need cleaning?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Under normal highway driving, clean roughly every 75,000 miles; clean more often in dusty or off-road conditions.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"K\u0026N","offers":[{"title":"Default Title","offer_id":55168539820375,"sku":"B00062Z23M","price":64.91,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/k-n-ru3580-front-profile.jpg?v=1790407474","url":"https:\/\/britishgarage.co.uk\/products\/k-n-high-flow-clamp-on-universal-air-filter-ru-3580-3-flange-5-height-washable-performance","provider":"British Garage","version":"1.0","type":"link"}