{"product_id":"hz-muffler-assembly-kit-for-honda-gx340-gx390-gx420-predator-420cc-direct-fit-muffler-and-exhaust-pipe-with-gaskets-and-hardwa","title":"HZ Muffler Assembly Kit for Honda GX340\/GX390\/GX420 \u0026 Predator 420cc — direct-fit muffler and exhaust pipe with gaskets and hardwa","description":"\u003cp\u003e\u003cstrong\u003eAn all-in-one replacement muffler and exhaust pipe kit designed to restore proper exhaust fit and quieter operation on Honda GX340\/GX390\/GX420 and Predator 420cc clone engines.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis HZ muffler assembly kit supplies the parts needed to replace worn or damaged exhaust components on a wide range of small horizontal engines used on pressure washers, water pumps, air compressors, log splitters and other power equipment. The package combines a muffler assembly, exhaust pipe (manifold), gaskets and mounting hardware so you can swap the full assembly in one service session rather than sourcing individual pieces. It’s manufactured to match the common mounting pattern and exhaust routing found on Honda GX-series engines and many popular clones.\u003c\/p\u003e\n\n\u003ch3\u003eWhich engines and machines will this muffler kit fit?\u003c\/h3\u003e\n\u003cp\u003eThis kit fits original Honda GX340, GX390 and GX420 engines and many clone or OEM equivalents such as Harbor Freight Predator 420cc and other 337–440cc engines. It is commonly used on equipment where these engines are installed.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCompatible with Honda GX340, GX390, GX420 series engines and GX clone units\u003c\/li\u003e\n  \u003cli\u003eWorks with Harbor Freight Predator 420cc and many 337–440cc engines\u003c\/li\u003e\n  \u003cli\u003eCommonly installed on pressure washers, water pumps, compressors, log splitters and chippers\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat parts are included and what does each do?\u003c\/h3\u003e\n\u003cp\u003eThe kit arrives ready for direct replacement: a muffler housing, exhaust pipe\/manifold, two gaskets, studs and nuts plus a spark plug. These parts restore the exhaust path and seal between engine head and muffler while providing the mounting hardware required for installation.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMuffler assembly: replaces the aging muffler body and heat shield\u003c\/li\u003e\n  \u003cli\u003eExhaust pipe\/manifold: routes exhaust from cylinder head to muffler\u003c\/li\u003e\n  \u003cli\u003eTwo gaskets and studs\/nuts: ensure a tight, leak-free seal and secure mounting\u003c\/li\u003e\n  \u003cli\u003eSpark plug (included): convenience for routine maintenance during replacement\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow difficult is installation and what tools will I need?\u003c\/h3\u003e\n\u003cp\u003eInstallation is straightforward for anyone comfortable with basic engine maintenance. You’ll remove the old muffler and manifold, fit the new gaskets and align the assembly to the cylinder head, then secure the provided studs and nuts. No welding or complex modification is required if the engine is the compatible pattern.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eBasic hand tools: ratchet, sockets, box wrenches and screwdrivers\u003c\/li\u003e\n  \u003cli\u003eTorque wrench recommended to tighten nuts to manufacturer specs\u003c\/li\u003e\n  \u003cli\u003eAllow 30–60 minutes for a single-unit replacement depending on access\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill this replace OEM part numbers and work with other brand equipment?\u003c\/h3\u003e\n\u003cp\u003eThe HZ kit is produced to match the mounting and dimensions of several OEM Honda part numbers and a broad list of aftermarket equipment models. It’s a cost-effective substitute for worn OEM mufflers on many branded machines that use GX-style horizontal engines.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDesigned as a replacement for common Honda GX muffler and manifold part numbers\u003c\/li\u003e\n  \u003cli\u003eUsed successfully on units from Simpson, DeWalt, Powermate, NorthStar and others\u003c\/li\u003e\n  \u003cli\u003eCompatible with many clone engines from Loncin, Lifan, Duromax, Generac and more\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho this is for: Mechanics, DIYers and rental shops that service small engine equipment and need a single kit to restore exhaust performance and reduce leaks or excessive noise. It’s suited for anyone maintaining pressure washers, pumps, compressors, chippers or other machinery powered by Honda GX-series engines or compatible clones who prefer a full replacement kit with all required hardware included.\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: Does this kit include all mounting hardware?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes — the kit comes with the muffler, exhaust pipe, two gaskets, two studs, five nuts and a spark plug for a full replacement.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Will it fit my Predator 420cc engine?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes — the HZ kit is compatible with Harbor Freight Predator 420cc and many 337–440cc GX-style clone engines.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"HZ","offers":[{"title":"Default Title","offer_id":48082905596062,"sku":"B09TJKP8X9","price":50.67,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/hz-muffler-front-assembly.jpg?v=1785819072","url":"https:\/\/northtrailauto.ca\/products\/hz-muffler-assembly-kit-for-honda-gx340-gx390-gx420-predator-420cc-direct-fit-muffler-and-exhaust-pipe-with-gaskets-and-hardwa","provider":"North Trail Auto","version":"1.0","type":"link"}