{"product_id":"k-n-fuel-filter-81-0221-1-4-flange-high-volume-backflushable-inline-filter","title":"K\u0026N Fuel Filter 81-0221 1\/4\" Flange — High‑Volume Backflushable Inline Filter","description":"\u003cp\u003e\u003cstrong\u003eK\u0026amp;N 81-0221 Fuel Filter is a high-volume, low-pressure inline fuel filter designed for easy backflushing and long service life.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThe K\u0026amp;N 81-0221 fuel filter combines a simple design with durable materials to protect fuel systems from debris while maintaining strong flow for many applications. It is offered with a 1\/4\" flange and sold individually or in 12-packs. Note: this part is not legal for sale or use in California on any pollution-controlled motor vehicle.\u003c\/p\u003e\n\n\u003ch3\u003eHow does the K\u0026amp;N 81-0221 keep fuel systems clean?\u003c\/h3\u003e\n\u003cp\u003eThe 81-0221 traps particles and contaminants before they reach injectors, carburetors, or pumps, reducing the risk of clogging. Its construction supports effective filtration without significantly restricting flow, making it suitable for engines that require steady fuel delivery.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eHigh-volume, low-pressure design for steady throughput\u003c\/li\u003e\n  \u003cli\u003eFiltration media that captures debris while preserving flow\u003c\/li\u003e\n  \u003cli\u003eInline placement prevents contaminants from reaching downstream components\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCan I service this filter myself and how?\u003c\/h3\u003e\n\u003cp\u003eYes — the K\u0026amp;N 81-0221 is designed to be cleaned by backflushing, a straightforward maintenance step that restores flow and extends service intervals. Backflushing dislodges trapped particles so the filter can be put back into use quickly.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eBackflushable construction for reusable maintenance\u003c\/li\u003e\n  \u003cli\u003eNo special tools required for routine cleaning\u003c\/li\u003e\n  \u003cli\u003eCleaning frequency depends on operating conditions and fuel quality\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat configurations and sizes are available?\u003c\/h3\u003e\n\u003cp\u003eThe product is available with a 1\/4\" flange connection and can be purchased as a single unit or in a 12-pack for fleet or multi-vehicle servicing. The compact inline form factor fits many common fuel lines and mounting setups.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eOption with a 1\/4\" flange for direct hose or line connection\u003c\/li\u003e\n  \u003cli\u003eSingle-unit purchase or bulk 12-pack for convenience\u003c\/li\u003e\n  \u003cli\u003eCompact inline shape fits tight engine compartments\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eAre there any legal or application limitations I should know about?\u003c\/h3\u003e\n\u003cp\u003eThis filter is intended for general fuel-system protection but may be subject to regional restrictions. Specifically, the K\u0026amp;N 81-0221 is not legal for sale or use in California on any pollution-controlled motor vehicle — check local regulations before purchasing for on-road use in restricted areas.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eNot legal for sale or use in California on pollution-controlled vehicles\u003c\/li\u003e\n  \u003cli\u003eSuitable for off-road, retrofit, and many aftermarket applications where allowed\u003c\/li\u003e\n  \u003cli\u003eConfirm compatibility with fuel type and engine requirements before installation\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: Mechanics, DIY enthusiasts, fleet managers, and anyone needing a reliable, serviceable inline fuel filter for engines that require steady fuel flow. Choose a single unit for one-off replacements or a 12-pack for workshops and multiple-vehicle maintenance; avoid use in California pollution-controlled vehicles because of legal restrictions.\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: Is the K\u0026amp;N 81-0221 filter reusable?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The 81-0221 is backflushable for repeated cleaning and extended service life.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I use this filter in California on my car?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No. It is not legal for sale or use in California on pollution-controlled motor vehicles.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"K\u0026N","offers":[{"title":"Default Title","offer_id":55163238285655,"sku":"B000E2AR70","price":32.86,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/kandn-81-0221-front-view.jpg?v=1790342351","url":"https:\/\/britishgarage.co.uk\/products\/k-n-fuel-filter-81-0221-1-4-flange-high-volume-backflushable-inline-filter","provider":"British Garage","version":"1.0","type":"link"}