Features:
- The Factory 4.1 RCT incorporates FMF's Resonance Chamber Technology™ both internally and externally
- In addition, FMF achieves a shorter overall length that is less susceptible to crash damage and complementary to their 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 their exacting specifications and is manufactured 100% at their Southern California factory
- Massive Power gains throughout the RPM range.
- Huge weight savings
- RTS (Rapid Tuning System)
Fit the models:
| HUSQVARNA |
FC 250 |
2016 |
| HUSQVARNA |
FC 250 |
2017 |
| HUSQVARNA |
FC 250 |
2018 |
| HUSQVARNA |
FC 350 |
2018 |
| HUSQVARNA |
FC 350 |
2017 |
| HUSQVARNA |
FC 350 |
2016 |
| HUSQVARNA |
FC 450 |
2017 |
| HUSQVARNA |
FC 450 |
2016 |
| HUSQVARNA |
FC 450 |
2018 |
| HUSQVARNA |
FE 250 |
2018 |
| HUSQVARNA |
FE 250 |
2017 |
| HUSQVARNA |
FE 250 |
2019 |
| HUSQVARNA |
FE 350 |
2019 |
| HUSQVARNA |
FE 350 |
2017 |
| HUSQVARNA |
FE 350 |
2018 |
| HUSQVARNA |
FE 450 |
2019 |
| HUSQVARNA |
FE 450 |
2018 |
| HUSQVARNA |
FE 450 |
2017 |
| HUSQVARNA |
FE 501 |
2018 |
| HUSQVARNA |
FE 501 |
2019 |
| HUSQVARNA |
FE 501 |
2017 |
| HUSQVARNA |
FX 350 |
2017 |
| HUSQVARNA |
FX 350 |
2018 |
| HUSQVARNA |
FX 450 |
2018 |
| HUSQVARNA |
FX 450 |
2017 |
| KTM |
EXC-F 250 |
2017 |
| KTM |
EXC-F 250 |
2018 |
| KTM |
EXC-F 250 |
2019 |
| KTM |
EXC-F 350 |
2018 |
| KTM |
EXC-F 350 |
2019 |
| KTM |
EXC-F 350 |
2017 |
| KTM |
EXC-F 450 |
2019 |
| KTM |
EXC-F 450 |
2018 |
| KTM |
EXC-F 450 |
2017 |
| KTM |
EXC-F 500 |
2017 |
| KTM |
EXC-F 500 |
2019 |
| KTM |
EXC-F 500 |
2018 |
| KTM |
SX-F 250 |
2018 |
| KTM |
SX-F 250 |
2016 |
| KTM |
SX-F 250 |
2017 |
| 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 |
2016 |
| KTM |
SX-F 450 |
2015 |
| KTM |
XC-F 250 |
2016 |
| KTM |
XC-F 250 |
2017 |
| 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 |
2016 |
| KTM |
XC-F 450 I |
2017 |
| KTM |
XC-F 450 I |
2018 |

FMF - Flying Machine Factory - 1973 was founded by a twenty-two-year-old named Donny Emler, a typical Southern Californian who, like everyone else in the 1970s, found a passion for riding and racing dirt bikes. FMF is now one of the most recognizable logos in motocross. The main area of FMF is the highest quality exhaust systems for dirt bikes.
| Brand |
Model |
Year |
Name |
CC |
| KTM |
SX-F |
2015 |
|
250 |
| KTM |
SX-F |
2015 |
|
450 |
| KTM |
SX-F |
2015 |
|
450 |
| KTM |
SX-F |
2015 |
Factory Edition |
250 |
| KTM |
SX-F |
2016 |
|
350 |
| KTM |
SX-F |
2016 |
|
450 |
| KTM |
SX-F |
2016 |
|
450 |
| KTM |
XC-F |
2016 |
|
250 |
| KTM |
XC-F |
2016 |
|
350 |
| KTM |
XC-F |
2016 |
|
450 |
| HUSQVARNA |
FC |
2016 |
|
250 |
| HUSQVARNA |
FC |
2016 |
|
350 |
| HUSQVARNA |
FC |
2016 |
|
450 |
| KTM |
SX-F |
2016 |
|
250 |
| KTM |
SX-F |
2015 |
Factory Edition |
450 |
| KTM |
SX-F |
2016 |
Factory Edition |
250 |
| KTM |
SX-F |
2016 |
Factory Edition |
450 |
| KTM |
SX-F |
2017 |
|
450 |
| KTM |
SX-F |
2017 |
|
350 |
| KTM |
SX-F |
2017 |
|
250 |
| KTM |
EXC-F |
2017 |
|
450 |
| KTM |
EXC-F |
2017 |
|
500 |
| KTM |
EXC-F |
2017 |
Sixdays |
500 |
| KTM |
EXC-F |
2017 |
|
350 |
| KTM |
EXC-F |
2017 |
Sixdays |
350 |
| KTM |
EXC-F |
2017 |
|
250 |
| KTM |
EXC-F |
2017 |
Sixdays |
250 |
| KTM |
EXC-F |
2017 |
Sixdays |
450 |
| KTM |
SX-F |
2017 |
|
450 |
| KTM |
XC-F |
2017 |
|
350 |
| KTM |
XC-F |
2017 |
|
250 |
| KTM |
XC-F |
2017 |
|
450 |
| HUSQVARNA |
FC |
2017 |
|
250 |
| HUSQVARNA |
FC |
2017 |
|
350 |
| HUSQVARNA |
FC |
2017 |
|
450 |
| HUSQVARNA |
FE |
2017 |
|
250 |
| HUSQVARNA |
FE |
2017 |
|
350 |
| HUSQVARNA |
FE |
2017 |
|
450 |
| HUSQVARNA |
FE |
2017 |
|
501 |
| HUSQVARNA |
FX |
2017 |
|
350 |
| HUSQVARNA |
FX |
2017 |
|
450 |
| HUSQVARNA |
FE |
2017 |
|
501 |
| KTM |
SX-F |
2017 |
Factory Edition |
450 |
| KTM |
SX-F |
2017 |
Factory Edition |
250 |
| KTM |
SX-F |
2018 |
|
450 |
| KTM |
SX-F |
2018 |
|
350 |
| KTM |
SX-F |
2018 |
|
250 |
| KTM |
EXC-F |
2018 |
|
500 |
| KTM |
EXC-F |
2018 |
Sixdays |
500 |
| KTM |
EXC-F |
2018 |
|
450 |
| KTM |
EXC-F |
2018 |
Sixdays |
450 |
| KTM |
EXC-F |
2018 |
|
350 |
| KTM |
EXC-F |
2018 |
Sixdays |
350 |
| KTM |
EXC-F |
2018 |
|
250 |
| KTM |
EXC-F |
2018 |
Sixdays |
250 |
| HUSQVARNA |
FC |
2018 |
|
250 |
| HUSQVARNA |
FE |
2018 |
|
250 |
| HUSQVARNA |
FC |
2018 |
|
350 |
| HUSQVARNA |
FE |
2018 |
|
350 |
| HUSQVARNA |
FX |
2018 |
|
350 |
| HUSQVARNA |
FC |
2018 |
|
450 |
| HUSQVARNA |
FE |
2018 |
|
450 |
| HUSQVARNA |
FX |
2018 |
|
450 |
| HUSQVARNA |
FE |
2018 |
|
501 |
| KTM |
EXC-F |
2019 |
|
250 |
| KTM |
EXC-F |
2019 |
Sixdays |
250 |
| KTM |
EXC-F |
2019 |
|
350 |
| KTM |
EXC-F |
2019 |
Sixdays |
350 |
| KTM |
SX-F |
2018 |
Factory Edition |
450 |
| KTM |
EXC-F |
2019 |
|
450 |
| KTM |
EXC-F |
2019 |
Sixdays |
450 |
| KTM |
EXC-F |
2019 |
|
500 |
| KTM |
EXC-F |
2019 |
Sixdays |
500 |
| HUSQVARNA |
FE |
2019 |
|
250 |
| HUSQVARNA |
FE |
2019 |
|
350 |
| HUSQVARNA |
FE |
2019 |
|
450 |
| HUSQVARNA |
FE |
2019 |
|
501 |
| KTM |
XC-F |
2018 |
|
350 |
| KTM |
XC-F |
2018 |
|
250 |
| KTM |
XC-F |
2018 |
|
450 |