FMF brings you its top-of-the-range Factory 4.1 RCT exhaust system, designed for GAS GAS, HUSQVARNA and KTM motorcycles, with unrivalled technical precision and optimized performance for the most demanding riders. This model incorporates exclusive internal and external FMF Resonance Chamber Technology™, which improves throttle flow while reducing noise, guaranteeing increased power throughout the rev range. Thanks to its reduced overall length and Factory Forward Engineering design, the muffler is close to the engine for optimum mass centralization, while being less exposed to damage in the event of a fall. Manufactured from aerospace-grade materials to FMF standards, this system is produced entirely at the FMF plant in Southern California. It offers significant weight reduction, incorporates the new RTS (Rapid Tuning System), MegaBomb manifold for enhanced torque, and a spark arrestor insert for off-road compliance.

Fits on :

GAS GAS EX 450 F 2023

GAS GAS EX 450 F 2022

GAS GAS EX 450 F 2021

GAS GAS MC 450 F 2023

GAS GAS MC 450 F 2022

GAS GAS MC 450 F 2021

HUSQVARNA FC 450 2022

HUSQVARNA FC 450 2021

HUSQVARNA FC 450 2020

HUSQVARNA FC 450 2020

HUSQVARNA FC 450 2019

HUSQVARNA FX 450 2022

HUSQVARNA FX 450 2021

HUSQVARNA FX 450 2020

HUSQVARNA FX 450 2019

KTM SX-F 450 2022

KTM SX-F 450 2021

KTM SX-F 450 2020

KTM SX-F 450 2020

KTM SX-F 450 2019

KTM SX-F 450 2018

KTM XC-F 450 I 2022

KTM XC-F 450 I 2021

KTM XC-F 450 I 2020

KTM XC-F 450 I 2019