{"product_id":"k-n-high-flow-universal-clamp-on-air-filter-re-0850-reusable","title":"K\u0026N High-Flow Universal Clamp-On Air Filter RE-0850 - Reusable","description":"\u003cp\u003eIn this review of the K\u0026amp;N High-Flow Original Lifetime Universal Clamp-On Air Filter RE-0850, the bottom line is straightforward: this is a durable, reusable air filter for anyone wanting reliable airflow gains and long-term savings over disposable filters. It is best for enthusiasts who need a clamp-on fit for custom intake setups or replacement applications where a 4 in flange and 6 in height suit the job. The single biggest reason to buy is its washable, lifetime construction that reduces recurring cost and landfill waste while maintaining strong airflow and engine protection.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngineered power:\u003c\/strong\u003e The High-Flow media is designed to increase horsepower and acceleration by improving airflow into the engine.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e4 layers of protection:\u003c\/strong\u003e Multiple layers of premium cotton gauze with a tacking agent create a dense mesh that traps harmful contaminants while allowing good flow.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRugged construction:\u003c\/strong\u003e Durable molded rubber flanges and quality materials mean the filter is built to last and resist vibration in clamp-on installations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWashable and reusable:\u003c\/strong\u003e The filter can be cleaned and reinstalled, cutting ongoing replacement costs and reducing waste compared with disposable paper filters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUniversal fitment:\u003c\/strong\u003e With a 4 in flange diameter and 1.75 in flange length, the clamp-on design adapts to many custom intake and performance setups.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMade in USA:\u003c\/strong\u003e Built domestically for consistent quality and backed by a 1-year limited warranty for peace of mind.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis filter is a solid choice for DIY mechanics, performance enthusiasts, and anyone running a custom intake or needing a simple clamp-on solution. It suits applications where the 4 in flange and 6 in height match the intake plumbing and where users value a washable, lifetime filter over recurring disposable replacements.\u003c\/p\u003e\n\u003cp\u003eIt is less suitable for someone who needs a guaranteed exact factory-style fit for a specific air box or who cannot accommodate the 6 in height or tapered shape. Buyers who prefer one-time low-maintenance disposable filters with no cleaning are also better served elsewhere.\u003c\/p\u003e\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eHigh-quality filter media offers improved airflow and potential power gains.\u003c\/li\u003e\n\u003cli\u003eReusable design cleans easily, reducing long-term cost and landfill waste.\u003c\/li\u003e\n\u003cli\u003eSturdy molded rubber flange provides vibration resistance and secure clamp mounting.\u003c\/li\u003e\n\u003cli\u003eMade in USA and backed by a 1-year limited warranty for reliability.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eUniversal sizing can lead to mixed fitment results; some users report the size or fit was not exact for their build.\u003c\/li\u003e\n\u003cli\u003ePeriodic cleaning is required rather than true maintenance-free operation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eK\u0026amp;N\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eRE-0850\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlange diameter\u003c\/td\u003e\n\u003ctd\u003e4 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter height\u003c\/td\u003e\n\u003ctd\u003e6 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlange length\u003c\/td\u003e\n\u003ctd\u003e1.75 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShape\u003c\/td\u003e\n\u003ctd\u003eRound tapered\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e1-Year Limited Warranty\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe K\u0026amp;N High-Flow RE-0850 is a practical, well-built clamp-on filter for anyone wanting reusable filtration and improved airflow in custom or aftermarket intake setups. It represents good value over time for users willing to clean the unit periodically and who can accommodate the universal 4 in flange and 6 in height.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHow often must this filter be cleaned?\u003c\/strong\u003e\u003cbr\u003eUnder normal highway driving it typically needs cleaning about every 75,000 miles, roughly every 5 years for average driving.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill this fit my intake?\u003c\/strong\u003e\u003cbr\u003eThe clamp-on design fits many applications but requires a 4 in flange and about 6 in height; fitment can vary so measure your intake before ordering.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs the filter pre-oiled and ready to install?\u003c\/strong\u003e\u003cbr\u003eYes, K\u0026amp;N filters come pre-oiled and can be dropped into place for quick installation.\u003c\/p\u003e","brand":"K\u0026N","offers":[{"title":"Default Title","offer_id":48614098075867,"sku":"B01G463QNQ","price":68.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/71xlrGx2lNL._AC_SL1500.jpg?v=1778353975","url":"https:\/\/gearmusthave.com\/products\/k-n-high-flow-universal-clamp-on-air-filter-re-0850-reusable","provider":"GearMustHave","version":"1.0","type":"link"}