{"product_id":"fmf-041602-factory-4-1-rct-slip-on-muffler-honda-crf450r-moto-house-mx","title":"FMF Factory 4.1 RCT Slip-On Muffler 041602 - Honda CRF450R \/ CRF450RX 2021-2026","description":"\u003ch2\u003e\u003cstrong\u003eFMF Factory 4.1 RCT Slip-On Muffler 041602 - Honda CRF450R \/ CRF450RX 2021-2026\u003c\/strong\u003e\u003c\/h2\u003e\n\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe FMF \u003cstrong\u003eFactory 4.1 RCT Slip-On Muffler\u003c\/strong\u003e features Resonance Chamber Technology, incorporating a patented core shape that reduces decibels while preserving maximum power output. Internal ducts within the chambers expand internal volume for better exhaust flow, producing power gains across the entire powerband.\u003c\/p\u003e\n\u003cp\u003eBuilt using FMF's Factory Forward Engineering to centralize mass and resist crash damage, this muffler pairs a natural stainless steel canister with a carbon fiber end cap. It includes a QuietCore 94 dB insert and a spark arrestor, meeting strict AMA and FIM sound requirements.\u003c\/p\u003e\n\u003ch3\u003eTop Features: FMF Factory 4.1 RCT\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eRCT (Resonance Chamber Technology) uses a patented core shape that lowers decibels while maintaining maximum power output.\u003c\/li\u003e\n\u003cli\u003eInternal ducts in the system chambers increase volume for improved exhaust flow and power gains across the entire range.\u003c\/li\u003e\n\u003cli\u003eFactory Forward Engineering design centralizes mass and reduces vulnerability to crash damage[cite: 1].\u003c\/li\u003e\n\u003cli\u003eInnovative rear end cap allows easy installation of tuning tip inserts or spark arrestors with the removal of four screws[cite: 1].\u003c\/li\u003e\n\u003cli\u003eMeets AMA and FIM sound requirements, and includes both a QuietCore 94 dB insert and a spark arrestor[cite: 1].\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003ePlease review the detailed compatibility data below to ensure an exact fitment match for your motorcycle before finalizing your purchase.\u003c\/p\u003e\n\u003ch3\u003eFitment List\u003c\/h3\u003e\n\u003ctable border=\"1\" cellpadding=\"5\" style=\"border-collapse: collapse; width: 100%;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"background-color: #f2f2f2;\"\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\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e2021-2026\u003c\/td\u003e\n\u003ctd\u003eHonda\u003c\/td\u003e\n\u003ctd\u003eCRF450R\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2021-2026\u003c\/td\u003e\n\u003ctd\u003eHonda\u003c\/td\u003e\n\u003ctd\u003eCRF450RX\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cb\u003eQ: Does this slip-on muffler come with a spark arrestor and quiet insert?\u003c\/b\u003e\u003cbr\u003eA: Yes, it includes both a QuietCore 94 dB insert and a spark arrestor[cite: 1].\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eQ: Is this slip-on compatible with the stock header?\u003c\/b\u003e\u003cbr\u003eA: Yes, it is fully compatible with either the stock header or an FMF header[cite: 1].\u003c\/p\u003e\n\u003ch3\u003eExpert Pro-Tip\u003c\/h3\u003e\n\u003cp\u003e\u003cb\u003eExpert Pro-Tip:\u003c\/b\u003e Apply a light layer of high-temperature silicone sealant at the slip-joint connection during installation to prevent exhaust leaks. Routinely check the four screws on the carbon fiber end cap to ensure they remain snug under high-revving 4-stroke conditions.\u003c\/p\u003e\n\u003ch3\u003eRecommended Pairings:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/motohousemx.com\/collections\/honda-4-stroke-dirt-bikes-performance-parts-accessories-moto-house-mx\"\u003eHonda 4-Stroke Performance Parts\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/motohousemx.com\/collections\/honda-crf450r-performance-parts-and-accessories-moto-house-mx\"\u003eHonda CRF450R Performance Parts \u0026amp; Accessories\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/motohousemx.com\/collections\/mx-off-road-motorcycle-tools\"\u003eMotorcycle Tools \u0026amp; Accessories\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eAbout Moto-House MX\u003c\/h3\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. We pride ourselves on great customer service, and every item ships FAST - straight to your door.\u003c\/p\u003e\n\u003cp\u003e\u003ci\u003e\u003cstrong\u003eMoto-House MX - Choice of Champions\u003c\/strong\u003e - Your premier powersports source with great customer service and lightning-fast shipping straight to your door.\u003c\/i\u003e\u003c\/p\u003e\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 041602 - Honda CRF450R \/ CRF450RX 2021-2026\",\n  \"brand\": {\n    \"@type\": \"Brand\",\n    \"name\": \"FMF\"\n  },\n  \"sku\": \"041602\",\n  \"mpn\": \"041602\",\n  \"description\": \"FMF 041602 Factory 4.1 RCT Slip-On Muffler for Honda CRF450R \/ CRF450RX 2021-2026. Stainless steel with carbon end cap. Fast shipping from Moto-House MX.\"\n}\n\u003c\/script\u003e","brand":"FMF","offers":[{"title":"Default Title","offer_id":42416828579923,"sku":"041602","price":809.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1754\/5421\/files\/fmf-factory-41-slip-on-muffler-041602-2021-2025-honda-crf450r-crf450rx-777853.jpg?v=1739157129","url":"https:\/\/motohousemx.com\/products\/fmf-041602-factory-4-1-rct-slip-on-muffler-honda-crf450r-moto-house-mx","provider":"Moto-House MX","version":"1.0","type":"link"}