{"product_id":"k-n-filter-2-3-4-inch-flange-5-7-8-inch-od-base-4-3-4-top-5-inch-height","title":"K\u0026N Universal Air Filter 2.75\" Flange, 5.875\" OD Base, 4.75\" Top","description":"\u003cdiv style=\"background:#f7f7f7;border-left:4px solid #c00000;padding:14px 18px;margin:0 0 18px;\"\u003e\n\u003ch3 style=\"margin:0 0 6px;font-size:1.1em;\"\u003eAbout K\u0026amp;N Engineering\u003c\/h3\u003e\n\u003cp style=\"margin:0;font-size:0.95em;line-height:1.55;\"\u003eK\u0026amp;N has been the world's leader in washable, reusable performance air filters since 1969. From the legendary cone filter to complete cold-air intake systems, K\u0026amp;N's cotton-gauze element delivers more airflow than paper while staying serviceable for the life of the vehicle.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch2\u003eK\u0026amp;N Universal Air Filter - Performance and Versatility\u003c\/h2\u003e\n\u003cp\u003eExperience enhanced airflow and superior filtration with the K\u0026amp;N Universal Air Filter (Model RU-4450). Engineered for a vast range of applications, from racing machines to everyday vehicles and equipment, this air filter is designed to deliver optimal performance and longevity. Its robust construction ensures it can withstand demanding conditions while providing clean air to your engine.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features \u0026amp; Specifications:\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlange Diameter:\u003c\/strong\u003e 2.75 inches (70 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBase Outer Diameter:\u003c\/strong\u003e 5.875 inches (149 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTop Outer Diameter:\u003c\/strong\u003e 4.75 inches (121 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFilter Height:\u003c\/strong\u003e 5 inches (127 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlange Type:\u003c\/strong\u003e 2.75 inch centered\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWashable \u0026amp; Reusable:\u003c\/strong\u003e Designed for multiple uses, saving you money and reducing waste.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh-Flow Filtration:\u003c\/strong\u003e K\u0026amp;N's signature media allows for increased airflow while capturing contaminants.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDurable Construction:\u003c\/strong\u003e Features a pliable rubber flange that absorbs vibration and ensures a secure fit.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eVersatile Applications:\u003c\/h3\u003e\n\u003cp\u003eThe K\u0026amp;N Universal Air Filter is ideal for a wide array of vehicles and equipment, including:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCustom automotive applications\u003c\/li\u003e\n  \u003cli\u003eMotorcycles\u003c\/li\u003e\n  \u003cli\u003eATVs\u003c\/li\u003e\n  \u003cli\u003eGenerators\u003c\/li\u003e\n  \u003cli\u003eSnowmobiles\u003c\/li\u003e\n  \u003cli\u003eTractors\u003c\/li\u003e\n  \u003cli\u003eRC cars\u003c\/li\u003e\n  \u003cli\u003eAnd many more!\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eBenefits:\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eImproves engine performance and acceleration.\u003c\/li\u003e\n  \u003cli\u003eProvides excellent engine protection against harmful contaminants.\u003c\/li\u003e\n  \u003cli\u003eReduces maintenance costs with its reusable design.\u003c\/li\u003e\n  \u003cli\u003eEnsures a secure and vibration-resistant seal.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eUpgrade your air intake system with the reliable performance of K\u0026amp;N. Get your Universal Air Filter RU-4450 today at GGCRACING.\u003c\/p\u003e\n\u003cdiv style=\"margin:24px 0;border-top:1px solid #eee;padding-top:18px;\"\u003e\n\u003ch3 style=\"margin:0 0 6px;\"\u003eOften bought with\u003c\/h3\u003e\n\u003cp style=\"font-size:0.9em;color:#555;margin:0 0 8px;\"\u003eOther popular K\u0026amp;N Engineering products customers consider together:\u003c\/p\u003e\n\u003cul style=\"padding-left:20px;margin:0;\"\u003e\n\u003cli style=\"margin:4px 0;\"\u003e\u003ca href=\"https:\/\/ggcracing.com\/products\/k-n-custom-racing-assembly-carbon-fiber-air-box-w-o-base-large\" style=\"color:#0066cc;text-decoration:none;\"\u003eK\u0026amp;N Custom Racing Assembly Carbon Fiber Air Box - Large\u003c\/a\u003e\u003c\/li\u003e\n\u003cli style=\"margin:4px 0;\"\u003e\u003ca href=\"https:\/\/ggcracing.com\/products\/k-n-custom-racing-assembly-carbon-fiber-air-box-large-solid-base-only\" style=\"color:#0066cc;text-decoration:none;\"\u003eK\u0026amp;N Custom Racing Assembly Carbon Fiber Air Box - Large Solid Base\u003c\/a\u003e\u003c\/li\u003e\n\u003cli style=\"margin:4px 0;\"\u003e\u003ca href=\"https:\/\/ggcracing.com\/products\/k-n-custom-racing-assembly-carbon-fiber-4in-air-box-w-o-base-large\" style=\"color:#0066cc;text-decoration:none;\"\u003eK\u0026amp;N 100-8591 Custom Racing Carbon Fiber Air Box - Large\u003c\/a\u003e\u003c\/li\u003e\n\u003cli style=\"margin:4px 0;\"\u003e\u003ca href=\"https:\/\/ggcracing.com\/products\/k-n-custom-racing-air-filter-rectangular-carbon-fiber-4in-air-box-w-2-75in-air-horn\" style=\"color:#0066cc;text-decoration:none;\"\u003eK\u0026amp;N 100-8593 Custom Racing Air Filter - Carbon Fiber 4in Air Box w\/ 2.75in Air Horn\u003c\/a\u003e\u003c\/li\u003e\n\u003cli style=\"margin:4px 0;\"\u003e\u003ca href=\"https:\/\/ggcracing.com\/products\/k-n-ford-gm-dodge-throttle-control-module\" style=\"color:#0066cc;text-decoration:none;\"\u003eK\u0026amp;N 20-1000 Throttle Control Module — Fits Ford, GM, Dodge\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\/\",\"@type\":\"Product\",\"name\":\"K\u0026N Universal Air Filter 2.75\\\" Flange, 5.875\\\" OD Base, 4.75\\\" Top\",\"description\":\"Boost performance with K\u0026N Universal Air Filter RU-4450. Features 2.75\\\" flange, 5.875\\\" OD base, 4.75\\\" top. Washable \u0026 reusable. Shop GGCRACING!\",\"brand\":{\"@type\":\"Brand\",\"name\":\"K\u0026N Engineering\"},\"mpn\":\"RU-4450\",\"url\":\"https:\/\/ggcracing.com\/products\/k-n-filter-2-3-4-inch-flange-5-7-8-inch-od-base-4-3-4-top-5-inch-height\",\"offers\":{\"@type\":\"Offer\",\"price\":\"54.99\",\"priceCurrency\":\"USD\",\"availability\":\"https:\/\/schema.org\/InStock\",\"url\":\"https:\/\/ggcracing.com\/products\/k-n-filter-2-3-4-inch-flange-5-7-8-inch-od-base-4-3-4-top-5-inch-height\",\"sku\":\"KNNRU-4450\"}}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"BreadcrumbList\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/ggcracing.com\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Intake\",\"item\":\"https:\/\/ggcracing.com\/collections\/intake\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"K\u0026N Engineering\",\"item\":\"https:\/\/ggcracing.com\/collections\/vendors?q=K\u0026N+Engineering\"},{\"@type\":\"ListItem\",\"position\":4,\"name\":\"K\u0026N Universal Air Filter 2.75\\\" Flange, 5.875\\\" OD Base, 4.75\\\" Top\",\"item\":\"https:\/\/ggcracing.com\/products\/k-n-filter-2-3-4-inch-flange-5-7-8-inch-od-base-4-3-4-top-5-inch-height\"}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"Does the K\u0026N Universal Air Filter 2.75\\\" Flange, 5.875\\\" OD Base, 4.75\\\" Top fit my vehicle?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Compatibility depends on your exact year, make, and model. Contact our experts at GGCRACING with your VIN and we'll verify before you order.\"}},{\"@type\":\"Question\",\"name\":\"How long is shipping for K\u0026N Engineering?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Most in-stock items ship same or next business day. Free shipping on orders over $99 in the continental US. Tracking is provided via email as soon as your order leaves our warehouse.\"}},{\"@type\":\"Question\",\"name\":\"How do I install the K\u0026N Universal Air Filter 2.75\\\" Flange, 5.875\\\" OD Base, 4.75\\\" Top?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Cold air intakes typically install in 30-60 minutes with basic hand tools. No tuning required for most plug-and-play kits.\"}}]}\u003c\/script\u003e","brand":"K\u0026N Engineering","offers":[{"title":"Default Title","offer_id":41457319837780,"sku":"KNNRU-4450","price":54.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0552\/3210\/2484\/files\/6e32da27089306da356e38bafcf3216f.jpg?v=1721701402","url":"https:\/\/ggcracing.com\/products\/k-n-filter-2-3-4-inch-flange-5-7-8-inch-od-base-4-3-4-top-5-inch-height","provider":"GGCRACING INC","version":"1.0","type":"link"}