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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 our 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 our exacting specifications and is manufactured 100% at our Southern California factory.
FMF Racing 18-26 Yamaha YZ450F /YZ450FX 19-24 Anod TI Factory 4.1 RCT SO Muffler w/R. Carbon Cap
$849.95
Sale price
$849.95
Regular price
$849.99
Select your bike to check fitment.
Fits 7 bike models
- Yamaha WR450F2019–2026
- Yamaha YZ450F2018–2026
- Yamaha YZ450F 50th Anniversary Edition2024
- Yamaha YZ450F 70th Anniversary Edition2026
- Yamaha YZ450F Monster Energy Yamaha Racing Edition2021–2023
- Yamaha YZ450F Monster Energy Yamaha Racing Edition2025
- Yamaha YZ450FX2018–2026
This Part Fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2019-2026 | Yamaha | WR450F | Base |
| 2018-2026 | Yamaha | YZ450F | Base |
| 2024 | Yamaha | YZ450F 50th Anniversary Edition | Base |
| 2026 | Yamaha | YZ450F 70th Anniversary Edition | Base |
| 2021-2023,2025 | Yamaha | YZ450F Monster Energy Yamaha Racing Edition | Base |
| 2018-2026 | Yamaha | YZ450FX | Base |