{"product_id":"k-n-engine-air-filter-kna-3174-18-000-mile-long-life-replacement-high-flow-filtration","title":"K\u0026N Engine Air Filter KNA-3174 — 18,000-Mile Long-Life Replacement, High-Flow Filtration","description":"\u003cp\u003e\u003cstrong\u003eThe K\u0026amp;N KNA-3174 is a long-life engine air filter engineered to provide up to 18,000 miles of reliable filtration and straightforward drop-in replacement for compatible vehicles.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eK\u0026amp;N has built a reputation since 1969 for high-flow performance filtration; the KNA-3174 brings that expertise to everyday driving with a premium synthetic or cellulose-blend media that balances airflow and protection. Designed to meet or exceed OEM fit and performance, this 18,000-mile replacement filter is a convenient upgrade for drivers who want longer service intervals and trusted filtration without changing their airbox or intake system.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this filter protect my engine while lasting longer?\u003c\/h3\u003e\n\u003cp\u003eThe KNA-3174 uses a refined filter media—either a premium synthetic or a tailored cellulose blend depending on the application—to trap contaminants while preserving airflow. That material choice and K\u0026amp;N's construction method result in up to 99% filtration efficiency and a service life rated at 18,000 miles under normal highway conditions.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003ePremium synthetic or cellulose-blend media for high-efficiency particle capture.\u003c\/li\u003e\n  \u003cli\u003eDurable frame and sealing to prevent bypass and maintain fit in the factory air box.\u003c\/li\u003e\n  \u003cli\u003eRated for 18,000 miles to reduce replacement frequency versus standard filters.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill the KNA-3174 fit my vehicle and require special installation?\u003c\/h3\u003e\n\u003cp\u003eThis K\u0026amp;N filter is engineered as a direct-fit replacement to be installed inside your existing factory air box, so no aftermarket housing or intake modifications are required. Most installations take only a few minutes and typically do not need tools, preserving the original equipment layout and warranty-friendly fit.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDirect-fit design for compatible models—drops into the factory air box.\u003c\/li\u003e\n  \u003cli\u003eTypically tool-free installation in minutes for most applications.\u003c\/li\u003e\n  \u003cli\u003eDesigned to meet or exceed OEM fit and function requirements.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat performance differences should I expect compared to standard disposable filters?\u003c\/h3\u003e\n\u003cp\u003eCompared with common 12,000-mile disposable filters, the KNA-3174 offers an extended service interval—up to 50% longer—so you change the filter less often. It maintains engine protection up to 99% filtration efficiency, while offering consistent airflow characteristics to support normal engine operation.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eUp to 50% longer replacement interval versus 12,000-mile filters.\u003c\/li\u003e\n  \u003cli\u003eMaintains effective airflow without sacrificing contaminant capture.\u003c\/li\u003e\n  \u003cli\u003eReduces maintenance frequency and waste from disposable filters.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow should I schedule replacement and care for this long-life filter?\u003c\/h3\u003e\n\u003cp\u003eK\u0026amp;N rates this filter for replacement every 18,000 miles under typical highway driving; real-world intervals depend on driving conditions and environment. Inspect during regular service intervals and replace sooner if you frequently drive in heavy dust, off-road, or severe conditions.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eReplace every 18,000 miles under normal highway driving conditions.\u003c\/li\u003e\n  \u003cli\u003eCheck filter condition during routine oil changes or inspections.\u003c\/li\u003e\n  \u003cli\u003eShorten intervals when driving in dusty or severe environments.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The K\u0026amp;N KNA-3174 suits drivers of compatible Mitsubishi, Nissan and Renault models who prefer fewer filter changes, reliable engine protection, and the convenience of a direct-fit replacement. It’s ideal for everyday commuters and road drivers seeking a balance of long service life and proven filtration performance without altering the factory intake.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: How often should I change the K\u0026amp;N KNA-3174?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Replace every 18,000 miles under normal highway driving; inspect sooner in dusty or severe conditions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Will this filter fit my factory air box?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes—KNA-3174 is a direct-fit replacement for listed models and typically installs without tools.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"K\u0026N","offers":[{"title":"Default Title","offer_id":55161069011287,"sku":"B0H3V96Z15","price":31.52,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/k-and-n-front-packaging-kna-3174.jpg?v=1790321798","url":"https:\/\/britishgarage.co.uk\/products\/k-n-engine-air-filter-kna-3174-18-000-mile-long-life-replacement-high-flow-filtration","provider":"British Garage","version":"1.0","type":"link"}