


Its compact, sturdy design, which complies with AMA/FIM standards, improves weight centralization and facilitates adjustment thanks to the RTS system.
FMF brings you the Slip-On Factory 4.1 RCT muffler, a high-end solution designed for HUSQVARNA and KTM motocross bikes, combining performance, lightness and robustness. This model incorporates FMF's exclusive Resonance Chamber Technology™, applied both inside and outside the silencer body, to optimize throttle flow and improve the power curve throughout the rev range. Thanks to its Factory Forward Engineering design, the muffler is moved closer to the engine to centralize mass, while reducing its overall length to limit exposure to impact and improve handling in competition. Manufactured 100% in the FMF plant in Southern California, the Factory 4.1 RCT is designed with aerospace-grade materials to exacting manufacturing standards, guaranteeing exceptional durability and significant weight reduction. It is also equipped with the RTS (Rapid Tuning System), enabling rapid and precise adjustment without complex disassembly. This silencer is the strategic choice for demanding riders looking for pure performance and reliability on the racetrack.
Fits on
HUSQVARNA FC 250 2018
HUSQVARNA FC 250 2017
HUSQVARNA FC 250 2016
HUSQVARNA FC 350 2018
HUSQVARNA FC 350 2017
HUSQVARNA FC 350 2016
HUSQVARNA FC 450 2018
HUSQVARNA FC 450 2017
HUSQVARNA FC 450 2016
HUSQVARNA FE 250 2019
HUSQVARNA FE 250 2018
HUSQVARNA FE 250 2017
HUSQVARNA FE 350 2019
HUSQVARNA FE 350 2018
HUSQVARNA FE 350 2017
HUSQVARNA FE 450 2019
HUSQVARNA FE 450 2018
HUSQVARNA FE 450 2017
HUSQVARNA FE 501 2019
HUSQVARNA FE 501 2018
HUSQVARNA FE 501 2017
HUSQVARNA FX 350 2018
HUSQVARNA FX 350 2017
HUSQVARNA FX 450 2018
HUSQVARNA FX 450 2017
KTM EXC-F 250 2019
KTM EXC-F 250 2018
KTM EXC-F 250 2017
KTM EXC-F 350 2019
KTM EXC-F 350 2018
KTM EXC-F 350 2017
KTM EXC-F 450 2019
KTM EXC-F 450 2019
KTM EXC-F 450 2018
KTM EXC-F 450 2018
KTM EXC-F 450 2017
KTM EXC-F 500 2019
KTM EXC-F 500 2018
KTM EXC-F 500 2017
KTM SX-F 250 2018
KTM SX-F 250 2017
KTM SX-F 250 2017
KTM SX-F 250 2016
KTM SX-F 250 2016
KTM SX-F 250 2015
KTM SX-F 350 2018
KTM SX-F 350 2017
KTM SX-F 350 2016
KTM SX-F 450 2018
KTM SX-F 450 2017
KTM SX-F 450 2017
KTM SX-F 450 2017
KTM SX-F 450 2016
KTM SX-F 450 2016
KTM SX-F 450 2016
KTM SX-F 450 2015
KTM XC-F 250 2017
KTM XC-F 250 2016
KTM XC-F 250 I 2018
KTM XC-F 350 I 2018
KTM XC-F 350 I 2017
KTM XC-F 350 I 2016
KTM XC-F 450 I 2018
KTM XC-F 450 I 2017
KTM XC-F 450 I 2016
Specific References
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