{"product_id":"k-n-universal-air-filter-high-flow-ru-4250","title":"K\u0026N Universal Air Filter | Clamp-On Conical, 3.75in Flange, 5in Tall | RU-4250","description":"\u003cp\u003eThe K\u0026amp;N RU-4250 is a universal clamp-on air filter with a round tapered, conical shape. It uses K\u0026amp;N reusable cotton filter media and clamps onto any air inlet that matches its 3.75 inch flange diameter, making it a common choice for custom and replacement intake setups where high airflow is wanted.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eType: High-Flow Air Filter Element\u003c\/li\u003e\n\u003cli\u003eStyle: Clamp-On, Round Tapered (Conical)\u003c\/li\u003e\n\u003cli\u003eBase Diameter: 5.375 in\u003c\/li\u003e\n\u003cli\u003eTop Diameter: 4.375 in\u003c\/li\u003e\n\u003cli\u003eHeight: 5 in\u003c\/li\u003e\n\u003cli\u003eFlange (Inlet) Diameter: 3.75 in\u003c\/li\u003e\n\u003cli\u003eFilter Media: Reusable Cotton\u003c\/li\u003e\n\u003cli\u003eColor: Red\u003c\/li\u003e\n\u003cli\u003eFitment: Universal\u003c\/li\u003e\n\u003cli\u003eQuantity: Each\u003c\/li\u003e\n\u003cli\u003ePart Number: RU-4250\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003ch5\u003eWhat size inlet does the K\u0026amp;N RU-4250 fit?\u003c\/h5\u003e\n\u003cp\u003eThe RU-4250 has a 3.75 inch flange diameter, so it clamps onto any intake tube or adapter with a 3.75 inch outside diameter.\u003c\/p\u003e\n\u003ch5\u003eIs the K\u0026amp;N RU-4250 washable and reusable?\u003c\/h5\u003e\n\u003cp\u003eYes. It uses K\u0026amp;N reusable cotton filter media that can be cleaned and re-oiled instead of being thrown away and replaced.\u003c\/p\u003e\n\u003ch5\u003eWhat are the dimensions of the RU-4250?\u003c\/h5\u003e\n\u003cp\u003eIt measures 5.375 inches across the base, tapers to 4.375 inches at the top, and stands 5 inches tall, with a 3.75 inch mounting flange.\u003c\/p\u003e\n\u003ch5\u003eIs the RU-4250 vehicle-specific?\u003c\/h5\u003e\n\u003cp\u003eNo. It is a universal clamp-on filter and is not vehicle-specific. It fits any application with a matching 3.75 inch flange diameter.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"What size inlet does the K\u0026N RU-4250 fit?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The RU-4250 has a 3.75 inch flange diameter, so it clamps onto any intake tube or adapter with a 3.75 inch outside diameter.\"}},{\"@type\":\"Question\",\"name\":\"Is the K\u0026N RU-4250 washable and reusable?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes. It uses K\u0026N reusable cotton filter media that can be cleaned and re-oiled instead of being thrown away and replaced.\"}},{\"@type\":\"Question\",\"name\":\"What are the dimensions of the RU-4250?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"It measures 5.375 inches across the base, tapers to 4.375 inches at the top, and stands 5 inches tall, with a 3.75 inch mounting flange.\"}},{\"@type\":\"Question\",\"name\":\"Is the RU-4250 vehicle-specific?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"No. It is a universal clamp-on filter and is not vehicle-specific. It fits any application with a matching 3.75 inch flange diameter.\"}}]}\u003c\/script\u003e","brand":"K\u0026N","offers":[{"title":"Default Title","offer_id":50925052002352,"sku":"BBWQ_RU-4250","price":94.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0586\/9548\/3440\/files\/KNERU-4250.jpg?v=1793403287","url":"https:\/\/berryperformancesales.com\/products\/k-n-universal-air-filter-high-flow-ru-4250","provider":"Berry Performance Sales","version":"1.0","type":"link"}