{"product_id":"fmf-044429-factory-4-1-rct-slip-on-muffler-yamaha-yz250f-wr250f-moto-house-mx","title":"FMF Factory 4.1 RCT Slip-On Muffler 044429 — Yamaha YZ250F \/ WR250F \/ YZ250FX 2014-2019","description":"\u003cdiv\u003e\n\u003ch1\u003e\u003cstrong\u003eFMF Factory 4.1 RCT Slip-On Muffler 044429 — Yamaha YZ250F \/ WR250F \/ YZ250FX 2014-2019\u003c\/strong\u003e\u003c\/h1\u003e\n\n\u003ch2\u003eProduct Description\u003c\/h2\u003e\n\u003cp\u003eTransform your Yamaha's performance with the \u003cstrong\u003eFMF Factory 4.1 RCT Slip-On Muffler\u003c\/strong\u003e. Designed for the YZ250F, WR250F, and YZ250FX platforms, this muffler utilizes FMF's patented \u003cstrong\u003eResonance Chamber Technology (RCT)\u003c\/strong\u003e. This innovative core shape effectively reduces decibel levels while significantly enhancing power output across the entire RPM range, giving your bike the responsive, hard-hitting performance needed for track or trail.\u003c\/p\u003e\n\u003cp\u003eEngineered from high-quality blue anodized titanium with a rugged carbon fiber end cap, this exhaust is as durable as it is lightweight. FMF’s \u003cstrong\u003eFactory Forward Engineering\u003c\/strong\u003e pulls the unit closer to the center of the bike, improving mass centralization for superior handling and better protection during falls. Proudly \u003cstrong\u003emade in the USA\u003c\/strong\u003e, this system is a direct bolt-on upgrade that works seamlessly with your stock header or an FMF aftermarket header.\u003c\/p\u003e\n\n\u003ch3\u003eTop Features: FMF Factory 4.1 RCT Slip-On Muffler\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eResonance Chamber Technology maintains peak power while meeting sound requirements.\u003c\/li\u003e\n  \u003cli\u003eInternal ducting increases exhaust volume for improved flow and power gains.\u003c\/li\u003e\n  \u003cli\u003eFactory Forward Engineering optimizes mass centralization for better bike handling.\u003c\/li\u003e\n  \u003cli\u003eVersatile end cap design enables easy installation of spark arrestors or sound-tuning inserts.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003ePlease review the detailed compatibility data below to ensure an exact fitment match for your motorcycle before finalizing your purchase.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eFitment List\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n    \u003cth\u003eYear Range\u003c\/th\u003e\n    \u003cth\u003eVehicle Brand\u003c\/th\u003e\n    \u003cth\u003eVehicle Model \u0026amp; Sub-Model\u003c\/th\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003e2015-2019\u003c\/td\u003e\n    \u003ctd\u003eYamaha\u003c\/td\u003e\n    \u003ctd\u003eWR250F\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003e2015-2019\u003c\/td\u003e\n    \u003ctd\u003eYamaha\u003c\/td\u003e\n    \u003ctd\u003eYZ250FX\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003e2014-2018\u003c\/td\u003e\n    \u003ctd\u003eYamaha\u003c\/td\u003e\n    \u003ctd\u003eYZ250F\u003c\/td\u003e\n  \u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is this system sound-compliant for off-road racing?\u003c\/strong\u003e\u003cbr\u003e\nA: Yes, it is designed to meet AMA and FIM sound requirements. A QuietCore 94 dB insert is included in the box for added sound suppression if needed.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Does this include a spark arrestor?\u003c\/strong\u003e\u003cbr\u003e\nA: Yes, the muffler comes with a spark arrestor pre-installed or included, making it compliant for riding in protected public lands where spark arrestors are mandatory.\u003c\/p\u003e\n\n\u003ch2\u003eExpert Pro-Tip\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eExpert Pro-Tip:\u003c\/strong\u003e To get the most out of your YZ250F engine, ensure your air filter is clean and your fuel mapping is updated to match the improved flow of this exhaust. Many riders find that a slight adjustment to the fuel mapping helps eliminate any decel-pop and ensures the engine runs cooler and stronger across the board.\u003c\/p\u003e\n\n\u003ch2\u003eRecommended Pairings\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eRecommended Pairings:\u003c\/strong\u003e\u003cbr\u003e\no    \u003ca href=\"https:\/\/motohousemx.com\/collections\/yamaha-yz250f-yz250fx-performance-parts-and-accessories\"\u003eYamaha YZ250F \/ YZ250FX Performance Parts\u003c\/a\u003e\u003cbr\u003e\no    \u003ca href=\"https:\/\/motohousemx.com\/collections\/mx-off-road-chains\"\u003eMX Performance Chains\u003c\/a\u003e\u003cbr\u003e\no    \u003ca href=\"https:\/\/motohousemx.com\/collections\/premium-motorcycle-chemicals-brake-fluid-bike-wash-coolant-chain-lubes\"\u003ePremium Motorcycle Chemicals \u0026amp; Maintenance\u003c\/a\u003e\u003c\/p\u003e\n\n\u003ch2\u003eAbout Moto-House MX\u003c\/h2\u003e\n\u003cp\u003eAt Moto-House MX, we carry the best brands in motocross and off-road performance. Our team has over 40 years of experience helping riders get more out of their bikes. Every order ships fast from our Central Florida location.\u003c\/p\u003e\n\n\u003cp\u003e\u003cem\u003e\u003cstrong\u003eMoto-House MX – Choice of Champions\u003c\/strong\u003e – Clermont \/ Montverde, FL. Central Florida's premier powersports source with lightning-fast worldwide shipping.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\/\",\n  \"@type\": \"Product\",\n  \"name\": \"FMF Factory 4.1 RCT Slip-On Muffler 044429\",\n  \"brand\": {\n    \"@type\": \"Brand\",\n    \"name\": \"FMF\"\n  },\n  \"sku\": \"044429\",\n  \"description\": \"FMF Factory 4.1 RCT Slip-On Muffler for Yamaha YZ250F, WR250F, and YZ250FX (2014-2019). High-performance blue anodized titanium exhaust system.\"\n}\n\u003c\/script\u003e\n\u003c\/div\u003e","brand":"FMF","offers":[{"title":"Default Title","offer_id":40773941952595,"sku":"044429","price":719.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1754\/5421\/files\/fmf-ti-factory-41-rct-slip-on-carbon-fiber-end-cap-044429-2014-2018-yamaha-yz250f-yz250fx-983864.jpg?v=1735343298","url":"https:\/\/motohousemx.com\/products\/fmf-044429-factory-4-1-rct-slip-on-muffler-yamaha-yz250f-wr250f-moto-house-mx","provider":"Moto-House MX","version":"1.0","type":"link"}