Features:
- FACTORY 4.1 RCT SLIP-ON MUFFLERS
- RCT (Resonance Chamber Technology) features a patented core shape that lowers decibels while maintaining maximum power output
- Internal ducts in the chambers of the RCT system increase internal volume for improved exhaust flow, resulting in power gains throughout the entire range of power
- FMF's Factory Forward Engineering centralizes mass and is less prone to crash damage
- Innovative rear end cap features simple installation of tuning tip inserts or spark arrestor with the removal of four screws
- Compatible with stock header or FMF header
- QuietCore 94 dB insert included
- Spark arrestor included in muffler
- Available in natural titanium or blue anodized finish with titanium or carbon fiber end caps
- Meet AMA and FIM sound requirements
- NOTE: Will not pass 2025 FIM sound regulation
Fits models:
YAMAHA WR 450 F 2026 ALL
YAMAHA WR 450 F 2025 ALL
YAMAHA WR 450 F 2024 ALL
YAMAHA WR 450 F 2023 ALL
YAMAHA WR 450 F 2022 ALL
YAMAHA WR 450 F 2021 ALL
YAMAHA WR 450 F 2020 EUROPE
YAMAHA WR 450 F 2019 EUROPE
YAMAHA YZ 450 F 2027 ALL
YAMAHA YZ 450 F 2027 70th Anniversary Edition ALL
YAMAHA YZ 450 F 2026 70th Anniversary Edition ALL
YAMAHA YZ 450 F 2026 ALL
YAMAHA YZ 450 F 2025 ALL
YAMAHA YZ 450 F 2025 Monster Energy Racing Edition ALL
YAMAHA YZ 450 F 2024 ALL
YAMAHA YZ 450 F 2024 50th Anniversary Edition ALL
YAMAHA YZ 450 F 2023 Monster Energy Racing Edition ALL
YAMAHA YZ 450 F 2023 ALL
YAMAHA YZ 450 F 2022 ALL
YAMAHA YZ 450 F 2022 Monster Energy Racing Edition ALL
YAMAHA YZ 450 F 2021 Monster Energy Racing Edition ALL
YAMAHA YZ 450 F 2021 ALL
YAMAHA YZ 450 F 2020 ALL
YAMAHA YZ 450 F 2019 ALL
YAMAHA YZ 450 F 2018 ALL
YAMAHA YZ 450 FX 2026 AMERICA
YAMAHA YZ 450 FX 2025 AMERICA
YAMAHA YZ 450 FX 2024 AMERICA
YAMAHA YZ 450 FX 2023 AMERICA
YAMAHA YZ 450 FX 2022 AMERICA
YAMAHA YZ 450 FX 2021 AMERICA
YAMAHA YZ 450 FX 2020 AMERICA
YAMAHA YZ 450 FX 2019 AMERICA
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 |
| YAMAHA |
YZ |
2018 |
|
450 |
| YAMAHA |
YZ |
2018 |
|
450 |
| YAMAHA |
YZ |
2018 |
|
450 |
| YAMAHA |
YZ |
2019 |
|
450 |
| YAMAHA |
YZ |
2019 |
|
450 |
| YAMAHA |
YZ |
2019 |
|
450 |
| YAMAHA |
WR |
2019 |
|
450 |
| YAMAHA |
YZ |
2020 |
|
450 |
| YAMAHA |
YZ |
2020 |
|
450 |
| YAMAHA |
YZ |
2020 |
|
450 |
| YAMAHA |
WR |
2020 |
|
450 |
| YAMAHA |
YZ |
2021 |
|
450 |
| YAMAHA |
YZ |
2021 |
|
450 |
| YAMAHA |
YZ |
2021 |
Monster Energy Racing Edition |
450 |
| YAMAHA |
WR |
2021 |
|
450 |
| YAMAHA |
YZ |
2022 |
|
450 |
| YAMAHA |
YZ |
2022 |
Monster Energy Racing Edition |
450 |
| YAMAHA |
WR |
2022 |
|
450 |
| YAMAHA |
YZ |
2022 |
|
450 |
| YAMAHA |
YZ |
2023 |
Monster Energy Racing Edition |
450 |
| YAMAHA |
YZ |
2023 |
|
450 |
| YAMAHA |
WR |
2023 |
|
450 |
| YAMAHA |
YZ |
2023 |
|
450 |
| YAMAHA |
YZ |
2024 |
50th Anniversary Edition |
450 |
| YAMAHA |
YZ |
2024 |
|
450 |
| YAMAHA |
WR |
2024 |
|
450 |
| YAMAHA |
YZ |
2024 |
|
450 |
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