The Factory 4.1 RCT incorporates the latest in FMF Resonance Chamber Technology™ both internally and externally. In addition, we achieve a shorter overall length that is less susceptible to crash damage and complementary to FMF Factory Forward Engineering - moving the muffler closer to the motor to centralize mass. The Factory 4.1 RCT is constructed from only aerospace grade materials that meet FMF's exacting specifications and is manufactured 100% at FMF's Southern California factory.
- All new incorporating the latest in 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
- Innovative rear end cap for simple installation of tuning tip inserts or spark arrestor
- Titanium mid-pipe for extreme light weight
Fitment:
Make |
Model |
Year |
GAS GAS |
EX350F |
21-22 |
GAS GAS |
EX450F |
21-22 |
GAS GAS |
MC350F |
23 |
GAS GAS |
MC450F |
21-23 |
HUSQVARNA |
FC350 |
19-22 |
HUSQVARNA |
FC450 |
19-22 |
HUSQVARNA |
FC450 ROCKSTAR EDITION |
18-21 |
HUSQVARNA |
FX350 |
19-22 |
HUSQVARNA |
FX450 |
19-22 |
KTM |
350 SX-F |
19-22 |
KTM |
350 XC-F |
19-22 |
KTM |
350 XC-F KAILUB RUSSELL |
21 |
KTM |
450 SX-F |
19-22 |
KTM |
450 SX-F FACTORY EDITION |
18-21 |
KTM |
450 XC-F |
19-22 |