{"product_id":"k-n-81-0221-inline-fuel-filter-1-4-flange-high-volume-backflushable-single-or-12-pack","title":"K\u0026N 81-0221 Inline Fuel Filter 1\/4\" Flange – High-Volume, Backflushable (Single or 12-Pack)","description":"\u003cstrong\u003eThe K\u0026amp;N 81-0221 is a high-volume, low-pressure inline fuel filter designed for easy backflushing and long service life in non-California regulated vehicles.\u003c\/strong\u003e\n\n\u003cp\u003eThis compact inline filter keeps fuel delivery flowing smoothly by trapping debris while offering simple servicing — just backflush to clean. It’s built for applications that need steady volume at low pressure and is offered with a 1\/4 inch flange and in single or 12-pack options. Note: Not legal for sale or use in California on any pollution controlled motor vehicle.\u003c\/p\u003e\n\n\u003ch3\u003eWhat kind of performance can I expect from this fuel filter?\u003c\/h3\u003e\n\u003cp\u003eThe 81-0221 focuses on high fuel volume throughput with low pressure drop so your engine or equipment receives steady fuel flow. It’s intended for setups where maintaining volume is more important than high-pressure filtration.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eHigh-volume design minimizes flow restriction during operation.\u003c\/li\u003e\n  \u003cli\u003eLow pressure characteristics reduce stress on the fuel system.\u003c\/li\u003e\n  \u003cli\u003eStable flow helps prevent lean spots caused by clogged inline elements.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow is the K\u0026amp;N 81-0221 maintained and cleaned?\u003c\/h3\u003e\n\u003cp\u003eMaintenance is quick: the element is designed for backflushing, which clears trapped particles without replacing the entire filter. Routine backflushing extends service intervals and lowers ongoing costs compared with disposable filters.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSimple backflush procedure restores flow; no special tools required.\u003c\/li\u003e\n  \u003cli\u003eReusable design reduces replacement frequency and waste.\u003c\/li\u003e\n  \u003cli\u003eAvailable in bulk (12-packs) for fleet maintenance or multiple vehicles.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhich fittings and packaging choices are available?\u003c\/h3\u003e\n\u003cp\u003eThis model is supplied with a 1\/4 inch flange to fit common low-pressure fuel lines and is sold either individually or as a 12-pack to suit one-off installs or service fleets. Choose the configuration that fits your maintenance schedule and inventory needs.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eIncludes 1\/4 inch flange compatible with standard hoses.\u003c\/li\u003e\n  \u003cli\u003eSingle units for solo replacement; 12-packs for shops and fleets.\u003c\/li\u003e\n  \u003cli\u003eCompact footprint fits tight engine bays and portable equipment.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIs the 81-0221 legal for all vehicles and emissions regions?\u003c\/h3\u003e\n\u003cp\u003eBe aware of regional emissions and vehicle regulations: this filter is not legal for sale or use in California on any pollution-controlled motor vehicle. Confirm local legislation before purchasing for road-going vehicles in regulated areas.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eNot compliant for sale\/use in California on pollution-controlled vehicles.\u003c\/li\u003e\n  \u003cli\u003eSuitable for off-road, racing, or non-California regulated applications.\u003c\/li\u003e\n  \u003cli\u003eCheck local and state rules for aftermarket fuel system parts compliance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The K\u0026amp;N 81-0221 is aimed at DIY mechanics, performance hobbyists, and maintenance shops that need a durable inline filter capable of high fuel flow and easy cleaning. It’s a practical choice for equipment and vehicles operating outside California emissions restrictions where a reusable, low-pressure filter is desirable.\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: Can I use the K\u0026amp;N 81-0221 on a street car in California?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No. This model is not legal for sale or use in California on pollution-controlled motor vehicles.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: How do I clean the K\u0026amp;N 81-0221 filter?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Clean by backflushing the element; no replacement needed for routine servicing unless damaged.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"K\u0026N","offers":[{"title":"Default Title","offer_id":48084417216670,"sku":"B000E2AR70","price":31.98,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/kn-81-0221-front-view.jpg?v=1785854697","url":"https:\/\/northtrailauto.ca\/products\/k-n-81-0221-inline-fuel-filter-1-4-flange-high-volume-backflushable-single-or-12-pack","provider":"North Trail Auto","version":"1.0","type":"link"}