{"product_id":"k-n-high-flow-clamp-on-air-filter-round-tapered-4-flange-9-height-reusable-pre-oiled-performance","title":"K\u0026N High-Flow Clamp-On Air Filter, Round Tapered 4\" Flange × 9\" Height — Reusable, Pre-Oiled Performance","description":"\u003cp\u003e\u003cstrong\u003eThe K\u0026amp;N RE-0870 is a washable, reusable clamp-on high-flow air filter (round tapered) designed to increase airflow and last the life of your vehicle.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis universal clamp-on filter combines multi-layer cotton gauze media, a pliable rubber flange, and rugged construction to offer a simple performance upgrade for many engines and aftermarket intakes. Built for clamp-on installations, the RE-0870 has a 4 inch flange diameter, 1.75 inch flange length, and a 9 inch overall height — dimensions suited to a wide range of applications where a cone-style, round-tapered filter is required. It ships pre-oiled and ready to install, and because it’s washable and reusable it reduces replacement waste compared with disposable filters.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this filter boost engine airflow and performance?\u003c\/h3\u003e\n\u003cp\u003eThe RE-0870 uses layered cotton gauze media with a tack-treated finish to allow increased airflow while capturing contaminants. Improved flow can help throttle response and maintain power delivery without modifying the intake system. K\u0026amp;N’s design balances filtration efficiency and airflow for common street and mild performance uses.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFour layers of premium cotton gauze for staged filtration\u003c\/li\u003e\n  \u003cli\u003eSpecially designed tacking agent to trap dirt while preserving flow\u003c\/li\u003e\n  \u003cli\u003ePre-oiled and optimized media for immediate use\u003c\/li\u003e\n  \u003cli\u003eEngineered to be compatible with many aftermarket intakes and factory housings\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat are the exact dimensions and fitment details I should check?\u003c\/h3\u003e\n\u003cp\u003eConfirm your intake pipe or clamp location accepts a 4 in flange diameter and that a 9 in height fits the available space. The flange length of 1.75 in provides a secure clamp surface; measure clearance for a tapered, cone-style shape when choosing the RE-0870. Universal clamp-on design offers broad compatibility but always verify physical fit before purchase.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFlange diameter: 4 in (direct clamp interface)\u003c\/li\u003e\n  \u003cli\u003eFlange length: 1.75 in (clamp engagement area)\u003c\/li\u003e\n  \u003cli\u003eFilter height: 9 in (overall vertical clearance)\u003c\/li\u003e\n  \u003cli\u003eShape: round tapered (cone-style) for performance intakes\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow often will I need to clean it and what's involved?\u003c\/h3\u003e\n\u003cp\u003eK\u0026amp;N filters are washable and reusable; under typical highway driving they recommend cleaning about every 75,000 miles (roughly five years by average annual mileage). Cleaning involves a K\u0026amp;N-approved cleaner, rinse, air-dry, and re-oiling to restore filtration characteristics. Routine inspection is advised in dusty or off-road conditions where more frequent service may be necessary.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eNormal service interval: ~75,000 miles (approx. 5 years)\u003c\/li\u003e\n  \u003cli\u003eUse K\u0026amp;N cleaner and oil for best results\u003c\/li\u003e\n  \u003cli\u003eSimple rinse, dry, and re-oil process — no replacement parts needed\u003c\/li\u003e\n  \u003cli\u003eInspect more often in dusty environments\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat materials, warranty, and origin details matter?\u003c\/h3\u003e\n\u003cp\u003eThe RE-0870 is built with durable molded rubber for a flexible flange that resists vibration and secures the clamp. The media construction and manufacturing methods emphasize long life; K\u0026amp;N backs the filter with a 1-year limited warranty. Filters are proudly made in the USA and are intended to reduce disposable-filter waste by offering a reusable alternative.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDurable molded rubber flange absorbs vibration and seals securely\u003c\/li\u003e\n  \u003cli\u003ePremium cotton gauze media with multiple layers for filtration\u003c\/li\u003e\n  \u003cli\u003e1-year limited warranty from K\u0026amp;N\u003c\/li\u003e\n  \u003cli\u003eMade in the USA and designed for long-term reuse\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho this is for: The K\u0026amp;N RE-0870 suits DIY mechanics, aftermarket intake installers, and performance-minded drivers who need a clamp-on cone filter with a 4 in inlet and 9 in height. It’s a practical choice for people seeking a reusable, pre-oiled filter that balances airflow and filtration, reduces waste from disposable filters, and fits many universal intake setups. Verify measurements for proper fit and follow K\u0026amp;N cleaning instructions to maintain performance over time.\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 K\u0026amp;N filter fit my 4 inch intake pipe?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes — the RE-0870 has a 4 in flange diameter and 1.75 in flange length; verify clamp clearance and 9 in height before installation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: How often must I clean the RE-0870?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Under normal highway driving clean about every 75,000 miles (roughly five years); inspect and service more often in dusty conditions.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"K\u0026N","offers":[{"title":"Default Title","offer_id":67586267414713,"sku":"B00029WZFC","price":161.43,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/3765\/3177\/files\/kandn-re-0870-front-packaging.jpg?v=1790481935","url":"https:\/\/redleafauto.ca\/products\/k-n-high-flow-clamp-on-air-filter-round-tapered-4-flange-9-height-reusable-pre-oiled-performance","provider":"Redleaf Auto","version":"1.0","type":"link"}