{"product_id":"fmf-045628-factory-4-1-rct-slip-on-muffler-ktm-husqvarna-gasgas-moto-house-mx","title":"FMF Factory 4.1 RCT Slip-On Muffler 045628 — KTM \/ Husqvarna \/ GasGas 2018-2023","description":"\u003ch1\u003e\u003cstrong\u003eFMF Factory 4.1 RCT Slip-On Muffler 045628 — KTM \/ Husqvarna \/ GasGas 2018-2023\u003c\/strong\u003e\u003c\/h1\u003e\n\u003ch2\u003eProduct Description\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eFMF Factory 4.1 RCT Slip-On Muffler\u003c\/strong\u003e is the ultimate exhaust upgrade for the discerning rider. Featuring FMF’s patented \u003cstrong\u003eResonance Chamber Technology (RCT)\u003c\/strong\u003e, this muffler utilizes a specialized core shape to significantly lower decibel levels while actually increasing power output. By maximizing internal volume through advanced ducting, the RCT system ensures smooth, potent power gains throughout the entire RPM range.\u003c\/p\u003e\n\u003cp\u003eEngineered with \u003cstrong\u003eFactory Forward Engineering\u003c\/strong\u003e, the muffler is positioned closer to the engine to centralize mass, improving handling and offering better protection against crash damage. This high-performance slip-on is constructed with a durable aluminum canister and a premium carbon fiber end cap, blending lightweight materials with professional-grade durability. It arrives ready for any environment, including a QuietCore 94 dB insert and a spark arrestor for trail compliance.\u003c\/p\u003e\n\u003ch3\u003eTop Features: FMF Factory 4.1 RCT Slip-On\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eResonance Chamber Technology (RCT) lowers sound output while boosting power\u003c\/li\u003e\n\u003cli\u003eFactory Forward Engineering design centralizes mass for improved handling\u003c\/li\u003e\n\u003cli\u003eLightweight aluminum canister with high-strength carbon fiber end cap\u003c\/li\u003e\n\u003cli\u003eIncludes QuietCore 94 dB insert and spark arrestor for maximum versatility\u003c\/li\u003e\n\u003cli\u003eCompatible with both stock headpipes and FMF performance headers\u003c\/li\u003e\n\u003cli\u003eProudly made in the U.S.A. and meets AMA\/FIM sound requirements\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\u003ch2\u003eFitment List\u003c\/h2\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; border: 1px solid #e0e0e0; margin-top: 15px; margin-bottom: 15px;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"background-color: #f7f7f7;\"\u003e\n\u003cth style=\"border: 1px solid #e0e0e0; padding: 12px; text-align: left; font-weight: bold; color: #333333;\"\u003eYear Range\u003c\/th\u003e\n\u003cth style=\"border: 1px solid #e0e0e0; padding: 12px; text-align: left; font-weight: bold; color: #333333;\"\u003eVehicle Brand\u003c\/th\u003e\n\u003cth style=\"border: 1px solid #e0e0e0; padding: 12px; text-align: left; font-weight: bold; color: #333333;\"\u003eVehicle Model \u0026amp; Sub-Model\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; color: #555555;\"\u003e2022-2023\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; color: #555555;\"\u003eGas Gas\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; color: #555555;\"\u003eMC 350F \/ EX 350F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; color: #555555;\"\u003e2021-2023\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; color: #555555;\"\u003eGas Gas\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; color: #555555;\"\u003eMC 450F \/ EX 450F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; color: #555555;\"\u003e2019-2022\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; color: #555555;\"\u003eHusqvarna\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; color: #555555;\"\u003eFC\/FX 350 \u0026amp; 450\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; color: #555555;\"\u003e2018-2022\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; color: #555555;\"\u003eKTM\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; color: #555555;\"\u003e350\/450 SX-F \u0026amp; XC-F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; color: #555555;\"\u003e2018-2020\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; color: #555555;\"\u003eKTM\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; color: #555555;\"\u003e450 SX-F Factory Edition\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is it easy to remove the spark arrestor?\u003c\/strong\u003e\u003cbr\u003eA: Yes, the rear end cap is designed for quick access, requiring the removal of only four screws to swap or remove the spark arrestor and tuning tip inserts.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Will this improve my bike's throttle response?\u003c\/strong\u003e\u003cbr\u003eA: Absolutely. The combination of RCT technology and reduced weight over the stock muffler helps the engine rev more freely and improves overall throttle response.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eExpert Pro-Tip:\u003c\/strong\u003e To keep your Factory 4.1 RCT performing at its best, plan on repacking the muffler every 20–30 hours of hard riding. A burnt-out packing will not only make the bike louder but will also negatively impact the power delivery and can eventually lead to casing damage from excessive internal heat.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eRecommended Pairings:\u003c\/strong\u003e\u003cbr\u003eo \u003ca href=\"https:\/\/motohousemx.com\/collections\/ktm-4-stroke-dirt-bikes-performance-parts-accessories-moto-house-mx\"\u003eKTM 4-Stroke Performance Parts\u003c\/a\u003e\u003cbr\u003eo \u003ca href=\"https:\/\/motohousemx.com\/collections\/husqvarna-4-stroke-dirt-bikes-performance-parts-accessories-moto-house-mx\"\u003eHusqvarna 4-Stroke Performance Parts\u003c\/a\u003e\u003cbr\u003eo \u003ca href=\"https:\/\/motohousemx.com\/collections\/premium-motorcycle-chemicals-brake-fluid-bike-wash-coolant-chain-lubes\"\u003ePremium Motorcycle Chemicals \u0026amp; Lubricants\u003c\/a\u003e\u003c\/p\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\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\u003cp\u003e \u003c\/p\u003e","brand":"FMF","offers":[{"title":"Default Title","offer_id":40178427691091,"sku":"045628","price":607.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1754\/5421\/files\/fmf-aluminum-factory-41-rct-slip-on-carbon-fiber-end-cap-2021-2022-gas-gas-mc-450f-045628-906977.jpg?v=1735341941","url":"https:\/\/motohousemx.com\/products\/fmf-045628-factory-4-1-rct-slip-on-muffler-ktm-husqvarna-gasgas-moto-house-mx","provider":"Moto-House MX","version":"1.0","type":"link"}