{"product_id":"4into1-uni-filter-clamp-on-breather-3-8-crankcase-breather-washable-oiled-foam-high-efficiency-filtration","title":"4into1 Uni Filter clamp-on breather 3\/8\" crankcase breather — washable oiled foam, high-efficiency filtration","description":"\u003cp\u003e\u003cstrong\u003e4into1 Uni Filter UP-102 3\/8\" Clamp-On Breather is a clamp-on foam breather that prevents contaminants from entering your ATV engine while allowing free airflow.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThe Uni Filter UP-102 is a compact, clamp-on crankcase breather engineered for off-road machines and small engines. It uses open-cell polyurethane foam treated with a tacky filter oil to capture dust, mud and airborne particles that otherwise circulate back into the intake or crankcase ventilation. Laboratory comparisons show Uni Breather foam elements outperform many standard paper breathers in trapping fine particulates while maintaining airflow, making it a practical upgrade for riders who demand reliable protection in dirty conditions.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this breather block dirt without restricting airflow?\u003c\/h3\u003e\n\u003cp\u003eThe UP-102 uses open-cell foam whose pores are impregnated with a specially formulated filter oil. Particles stick to the oiled foam surfaces as air passes through, while the pore structure still permits venting and pressure equalization.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eOpen-cell polyurethane foam balances filtration and air passage.\u003c\/li\u003e\n  \u003cli\u003eFilter oil increases particle adhesion without clogging quickly.\u003c\/li\u003e\n  \u003cli\u003eLaboratory testing indicates higher efficiency than many paper elements.\u003c\/li\u003e\n  \u003cli\u003e3\/8\" clamp-on fitting installs without modifying housings on compatible engines.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow easy is it to install and maintain on an ATV or small engine?\u003c\/h3\u003e\n\u003cp\u003eInstallation is straightforward: slide the breather onto the 3\/8\" tube or vent and secure the clamp. Routine care consists of inspecting the foam and reapplying filter oil when contamination builds up; the foam is washable and reusable when cleaned gently and allowed to dry.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eTool-free clamp adjusts to a snug fit on 3\/8\" ports.\u003c\/li\u003e\n  \u003cli\u003eWashable polyurethane foam extends service life.\u003c\/li\u003e\n  \u003cli\u003eRe-oil with a small amount of filter oil after cleaning for optimal capture.\u003c\/li\u003e\n  \u003cli\u003eSimple visual checks detect heavy soiling before performance drops.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill this breather fit my vehicle or toolbox?\u003c\/h3\u003e\n\u003cp\u003eThe UP-102 is made for 3\/8\" diameter vent tubes common on many ATVs, dirt bikes, and small engines; however, confirm your vent size before ordering. Its compact clamp-on design keeps it usable across a variety of layouts without requiring adapters in most cases.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDesigned for 3\/8\" vent tubes—measure before purchase.\u003c\/li\u003e\n  \u003cli\u003eLow-profile shape fits tight engine bays and exposed roll cages.\u003c\/li\u003e\n  \u003cli\u003eUniversal clamp fits a range of aftermarket and OEM vent hoses.\u003c\/li\u003e\n  \u003cli\u003eLightweight construction minimizes added weight or torque on fittings.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? The 4into1 Uni Filter UP-102 suits riders, mechanics and small-engine owners who need a compact, reusable breather that traps fine grit better than many paper alternatives. It’s particularly useful for off-road enthusiasts, utility vehicle operators and anyone who frequently runs engines in dusty, muddy or wet environments and wants a simple, serviceable way to keep contaminants out of the crankcase ventilation or intake path.\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 the UP-102 be washed and reused?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. Gently wash the foam, let it dry fully, then reapply filter oil before reinstalling.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What vent size does this breather fit?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: It fits 3\/8\" diameter vent tubes; measure your port to confirm compatibility.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"4into1","offers":[{"title":"Default Title","offer_id":48084335165598,"sku":"B000OO0XL8","price":30.21,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/4into1-uni-filter-up-102-front-view.jpg?v=1785850478","url":"https:\/\/northtrailauto.ca\/products\/4into1-uni-filter-clamp-on-breather-3-8-crankcase-breather-washable-oiled-foam-high-efficiency-filtration","provider":"North Trail Auto","version":"1.0","type":"link"}