FMF Factory 4.1 RCT Stainless Steel/Aluminum Full System w/Carbon Tip (044477)
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.
- Massive Power gains throughout the RPM range
- Huge weight savings
- New RTS (Rapid Tuning System)
- FMF uses the highest quality proprietary blend stainless steel made especially to our standards..
- Spark arrestor screen insert included
- 94dB insert included
- For closed course competition only
| Compatible Vehicles | |||
| Years | Make | Make | Notes |
| 2024 | Yamaha | WR450F | |
| 2023-2024 | Yamaha | YZ450F | |
| 2024 | Yamaha | YZ450F 50th Anniversary Edition | |
| 2023 | Yamaha | YZ450F Monster Energy Yamaha Racing Edition | |
| 2024 | Yamaha | YZ450FX | |