{"product_id":"fmf-aluminum-factory-4-1-rct-slip-on-exhaust-with-end-cap-part-045647","title":"FMF Aluminum Factory 4.1 RCT Slip-On Exhaust with End Cap, Part 045647","description":"\u003cp\u003eThe FMF Aluminum Factory 4.1 RCT slip-on exhaust is engineered for select KTM and Husqvarna off-road motorcycles. Featuring FMF Resonance Chamber Technology, this exhaust uses a patented core shape to reduce sound output while maintaining strong power performance. Its patented canister shape provides additional internal volume for sound-absorbing material, while the chamber design refines exhaust pressure for optimized response.\u003c\/p\u003e\u003cp\u003eFactory Forward Engineering centralizes the exhaust mass and helps reduce the likelihood of crash damage. The exhaust is tuned with application-specific core specifications to provide a precise fit and performance-focused replacement for the original equipment muffler. The innovative rear end cap allows straightforward installation of tuning tip inserts or a spark arrestor, and the included spark arrestor supports trail and off-road use where required.\u003c\/p\u003e\u003cp\u003eThis FMF Factory 4.1 RCT model features an aluminum canister and stainless steel mid-pipe. A wash plug is included to help protect the exhaust system during cleaning and maintenance. Manufacturer part number 045647 and vendor part number 045647 identify this FMF exhaust assembly. It fits 2020-2021 KTM 350 XCF-W and KTM 500 XCF-W motorcycles, as well as 2020-2021 Husqvarna FE 250, FE 350, and FE 501 models. Verify the motorcycle year and model before installation.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eResonance Chamber Technology: Uses advanced chamber engineering to balance sound control with strong power output.\u003c\/li\u003e\n\u003cli\u003ePatented Core Shape: Lowers exhaust sound while helping maintain maximum performance.\u003c\/li\u003e\n\u003cli\u003ePatented Canister Shape: Increases internal volume for additional sound-absorbing material.\u003c\/li\u003e\n\u003cli\u003ePatented Chamber Design: Enhances and refines exhaust pressure for application-specific performance.\u003c\/li\u003e\n\u003cli\u003eFactory Forward Engineering: Centralizes mass and helps reduce vulnerability to crash damage.\u003c\/li\u003e\n\u003cli\u003eApplication-Tuned Core: Optimized core specifications provide a precise fit and tuned exhaust performance.\u003c\/li\u003e\n\u003cli\u003eInnovative Rear End Cap: Simplifies installation of tuning tip inserts or a spark arrestor.\u003c\/li\u003e\n\u003cli\u003eAluminum Construction: Includes an aluminum canister with a stainless steel mid-pipe.\u003c\/li\u003e\n\u003cli\u003eIncluded Accessories: Comes with a spark arrestor and wash plug.\u003c\/li\u003e\n\u003cli\u003eFitment: Fits 2020-2021 KTM 350 XCF-W and 500 XCF-W, plus 2020-2021 Husqvarna FE 250, FE 350, and FE 501 motorcycles.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cbr\u003e\nFitment:\u003cbr\u003e\n2020 Husqvarna FE 250\u003cbr\u003e\n2020 Husqvarna FE 350\u003cbr\u003e\n2020 Husqvarna FE 450\u003cbr\u003e\n2020 Husqvarna FE 501\u003cbr\u003e\n2020 KTM 350 XCF-W\u003cbr\u003e\n2020 KTM 500 XCF-W\u003cbr\u003e\n2021 Gas-Gas EC 250F\u003cbr\u003e\n2021 Gas-Gas EC 350F\u003cbr\u003e\n2021 Husqvarna FE 250\u003cbr\u003e\n2021 Husqvarna FE 350\u003cbr\u003e\n2021 Husqvarna FE 450\u003cbr\u003e\n2021 Husqvarna FE 501\u003cbr\u003e\n2021 KTM 350 XCF-W\u003cbr\u003e\n2021 KTM 500 XCF-W\u003cbr\u003e\n2022 Gas-Gas EC 350F\u003cbr\u003e\n2022 Husqvarna FE 250\u003cbr\u003e\n2022 Husqvarna FE 350\u003cbr\u003e\n2022 Husqvarna FE 450\u003cbr\u003e\n2022 Husqvarna FE 501\u003cbr\u003e\n2022 KTM 350 XCF-W\u003cbr\u003e\n2022 KTM 500 XCF-W\u003cbr\u003e\n2023 Gas-Gas EC 350F\u003cbr\u003e\n2023 Husqvarna FE 250\u003cbr\u003e\n2023 Husqvarna FE 350\u003cbr\u003e\n2023 Husqvarna FE 450\u003cbr\u003e\n2023 Husqvarna FE 501\u003cbr\u003e\n2023 KTM 350 XCF-W\u003cbr\u003e\n2023 KTM 450 XCF-W\u003cbr\u003e\n2023 KTM 500 XCF-W","brand":"FMF","offers":[{"title":"Default Title","offer_id":67552023904491,"sku":"79-40645","price":464.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0611\/3882\/9547\/files\/9066-5db99d47cd391.jpg?v=1790732539","url":"https:\/\/ctracingservices.com\/products\/fmf-aluminum-factory-4-1-rct-slip-on-exhaust-with-end-cap-part-045647","provider":"Cascade Tire \u0026 Racing Services","version":"1.0","type":"link"}