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FMF Racing Factory 4.1 RCT Full System - Blue Titanium Muffler - Carbon End Cap - 045639



Incorporating Resonance Chamber Technology
Patented core shape lowers sound level while maintaining maximum power output
Patented canister shape increases internal volume for more sound absorbing material
Patented chamber design to enhance and refine exhaust pressure
Factory Forward Engineering centralizes mass and is less prone to crash damage
Tuned exhaust with optimized core specifications for each application
Comes with the quality, craftsmanship and performance expected from FMF
Meets AMA and FIM sound requirements
QuietCore 94db insert included
Spark arrestor included in muffler
Built 100% in the USA at FMFs state-of-the-art-factory
Maintenance made easy with the removal of 4 screws on the front end cap

Product Series

Application List

2019 - 2022KTM450 SX-FNone
2019 - 2022KTM450 XC-FNone
2018 - 2021KTM450 SX-F Factory EditionNone
2021 - 2022Gas GasEX 450FNone
2018 - 2020HusqvarnaFC450 Rockstar EditionNone
2021 - 2022Gas GasMC 450FNone
2019 - 2022HusqvarnaFC450None
2019 - 2022HusqvarnaFX450None

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