{"product_id":"k-n-universal-air-filter-3-1-2in-flange-5-1-2in-base-4-1-2in-top-6-1-2in-height-1","title":"K\u0026N Round Tapered Universal Air Filter, XD Extra Duty, 3-1\/2in Flange ID x 5-1\/2in Base OD x 4-1\/2in Top OD x 6-1\/2in Height","description":"\u003cp\u003eThis K\u0026amp;N round tapered universal air filter has a 3-1\/2 inch inside flange diameter, a 5-1\/2 inch base outside diameter, a 4-1\/2 inch top outside diameter, and stands 6-1\/2 inches tall, built as a clamp-on filter for custom air intake tubes, velocity stacks, carburetors, and throttle bodies on cars, trucks, and off-road and race applications.\u003c\/p\u003e\u003cp\u003eThe filter media is K\u0026amp;N's washable, reusable oiled cotton gauze with extra-duty wire support, engineered to increase airflow to the engine while capturing dirt and contaminants, and independent ISO 5011 testing shows K\u0026amp;N filters typically achieve 96%-99% filtration efficiency.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eUniversal Clamp-On Design:\u003c\/strong\u003e Fits any tube with a 3-1\/2 inch outside diameter using the included wire-supported base clamp.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWashable \u0026amp; Reusable:\u003c\/strong\u003e K\u0026amp;N's oiled cotton gauze with extra-duty wire support media is cleaned with K\u0026amp;N Filter Care cleaner and re-oiled instead of thrown away, and is protected by the 10-Year\/Million Mile Limited Warranty.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHigh-Flow Filtration:\u003c\/strong\u003e ISO 5011 lab testing consistently shows 96%-99% cumulative filtration efficiency, balancing airflow and engine protection.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDurable Construction:\u003c\/strong\u003e An extra-duty wire mesh backing reinforces the pleats for added durability in dusty, off-road, or heavy-duty applications and a wire mesh support structure resist collapsing under high-vacuum conditions.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat's Included\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e1x universal air filter\u003c\/li\u003e\n\u003cli\u003eBase clamp\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eVehicle Fitment\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\u003cli\u003ePassenger cars, trucks, and SUVs (custom intake, carburetor, and throttle body applications)\u003c\/li\u003e\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eImportant Notes\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eThis is a universal-fit filter sized by flange, base, top, and height dimensions rather than by vehicle; measure your existing filter or intake tube before ordering.\u003c\/li\u003e\n\u003cli\u003eThis XD (Extra Duty) version shares the same external dimensions as K\u0026amp;N's standard RU-4630 filter but adds reinforced wire support for harsher operating conditions; confirm which version you need before ordering.\u003c\/li\u003e\n\u003cli\u003eK\u0026amp;N part number RU-4630XD.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eWhy Choose K\u0026amp;N\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eK\u0026amp;N Engineering has built high-flow air filtration products in Riverside, California since 1969, when founders Ken Johnson and Norm McDonald began hand-building oiled cotton gauze air filters for off-road motorcycles. That same washable, reusable cotton gauze filtration technology now spans air filters, cold air intakes, oil filters, and cabin air filters, all tested in-house to the ISO 5011 industry standard and backed by K\u0026amp;N's own filtration lab.\u003c\/p\u003e","brand":"K\u0026N Engineering","offers":[{"title":"Default Title","offer_id":51980483232065,"sku":"KNNRU-4630XD","price":94.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0835\/9362\/5921\/files\/6c7aeb21cd55b6f96921f0bd2b2d1c58.jpg?v=1784508370","url":"https:\/\/lunaticsco.com\/products\/k-n-universal-air-filter-3-1-2in-flange-5-1-2in-base-4-1-2in-top-6-1-2in-height-1","provider":"Lunaticsco","version":"1.0","type":"link"}