{"product_id":"k-n-filter-universal-rubber-filter-3-75in-flange-id-5-375in-base-od-4-375in-top-od-5in-height","title":"K\u0026N Filter Universal Rubber Filter 3.75in Flange ID \/ 5.375in Base OD \/ 4.375in Top OD \/ 5in Height","description":"\u003cp\u003e\u003cstrong\u003eSKU:\u003c\/strong\u003e \u003cspan itemprop=\"sku\"\u003eRU-4250\u003c\/span\u003e | \u003cstrong\u003eUPC:\u003c\/strong\u003e 024844045164\u003c\/p\u003e\n\n\u003ch4\u003e\u003cstrong\u003eK\u0026amp;N Filter Universal Rubber Filter 3.75in Flange ID \/ 5.375in Base OD \/ 4.375in Top OD \/ 5in Height\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eK\u0026amp;N RU-4250 universal clamp-on air filter fits racing vehicles radio-controlled cars generators snowmobiles tractors and custom intakes regardless of angle or offset. Molded rubber flanges absorb vibration stretch up to 1\/16 inch for secure fit. Washable reusable design traps contaminants while boosting airflow for more horsepower and acceleration.\u003c\/p\u003e\n\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e4 Layers of Protection:\u003c\/strong\u003e Multiple layers of premium cotton gauze with tacking agent create mesh media to block trap dirt and harmful contaminants.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClean Once Every 5 Years:\u003c\/strong\u003e Handles 75000 miles under highway conditions before cleaning based on 15000 miles per year average.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEasy Installation:\u003c\/strong\u003e Pre-oiled ready-to-use clamp-on design delivers quick performance gains with minimal effort.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngineered Power:\u003c\/strong\u003e Advanced filter media increases airflow for higher horsepower acceleration and engine response.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRugged Construction:\u003c\/strong\u003e Durable premium materials and manufacturing ensure lifetime durability in demanding conditions.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eProduct Notes\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003ePre-oiled and washable for repeated use with oiled cotton gauze media.\u003c\/li\u003e\n\u003cli\u003eRe-oil after cleaning using K\u0026amp;N air filter oil for peak performance.\u003c\/li\u003e\n\u003cli\u003ePackage weight 0.9 lb ships in protective box approximately 6in x 6in x 6in.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eProfessional installation recommended.\u003c\/li\u003e\n\u003cli\u003eClamp-on rubber flange secures to 3.75in ID intake stretches slightly for precise fit.\u003c\/li\u003e\n\u003cli\u003eCompatible with custom air intakes no additional hardware required.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eThis Part Fits\u003c\/h4\u003e\n\u003ctable border=\"1\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eYear\u003c\/th\u003e\n\u003cth\u003eMake\u003c\/th\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eSubmodel\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eUniversal\u003c\/td\u003e\n\u003ctd\u003eVarious\u003c\/td\u003e\n\u003ctd\u003eRacing Vehicles\u003c\/td\u003e\n\u003ctd\u003eCustom Intakes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUniversal\u003c\/td\u003e\n\u003ctd\u003eVarious\u003c\/td\u003e\n\u003ctd\u003eGenerators\u003c\/td\u003e\n\u003ctd\u003eAll Models\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUniversal\u003c\/td\u003e\n\u003ctd\u003eVarious\u003c\/td\u003e\n\u003ctd\u003eSnowmobiles\u003c\/td\u003e\n\u003ctd\u003eAll Models\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUniversal\u003c\/td\u003e\n\u003ctd\u003eVarious\u003c\/td\u003e\n\u003ctd\u003eTractors ATVs\u003c\/td\u003e\n\u003ctd\u003eCustom Fit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch4\u003eWhy Choose K\u0026amp;N?\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eProven leader in air filtration for motorsports and powersports.\u003c\/li\u003e\n\u003cli\u003eHigh-flow oiled media outperforms paper filters in airflow and filtration.\u003c\/li\u003e\n\u003cli\u003ePrecision-engineered flanges ensure vibration-proof seal on any intake.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003e\u003cstrong\u003eFrequently Asked Questions\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n \u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e What intake sizes does the RU-4250 fit?\u003cbr\u003e\n \u003cstrong\u003eA:\u003c\/strong\u003e 3.75in flange inside diameter with 5.375in base OD 4.375in top OD 5in height suits tapered custom intakes.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e Is the filter material washable?\u003cbr\u003e\n \u003cstrong\u003eA:\u003c\/strong\u003e Yes premium cotton gauze cleans with K\u0026amp;N cleaning kit re-oil for like-new performance.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e What warranty covers this filter?\u003cbr\u003e\n \u003cstrong\u003eA:\u003c\/strong\u003e 1-Year Limited Warranty protects against defects in materials workmanship.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eShipping \u0026amp; Handling\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMethod:\u003c\/strong\u003e Ground shipping via UPS or FedEx\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAvailability:\u003c\/strong\u003e In stock - ships same or next business day\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackaging:\u003c\/strong\u003e Secure box 6in x 6in x 6in dimensions\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.9 lb\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"K\u0026N Engineering","offers":[{"title":"Default Title","offer_id":40094261542991,"sku":"KNNRU-4250","price":94.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1062\/7920\/files\/kn-filter-universal-rubber-filter-3_75in-flange-id-5_375in-base-od-4_375in-top-od-5in-height-kn-engineering.jpg?v=1766994578","url":"https:\/\/www.blackopsautoworks.com\/products\/k-n-filter-universal-rubber-filter-3-75in-flange-id-5-375in-base-od-4-375in-top-od-5in-height","provider":"Black Ops Auto Works","version":"1.0","type":"link"}