Description
Features
- 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 uses the highest quality proprietary blend of alloy grade titanium made especially to our standards
- Massive power gains throughout the RPM range
- New RTS (Rapid Tuning System)
- Huge weight savings
- Not legal for use in California on pollution controlled vehicles, race use only in California - waiver available
| 2022 | Yamaha | YFZ450R |
| 2021 | Yamaha | YFZ450R |
| 2020 | Yamaha | YFZ450R |
| 2019 | Yamaha | YFZ450R |
| 2018 | Yamaha | YFZ450R |
| 2017 | Yamaha | YFZ450R |
| 2016 | Yamaha | YFZ450R |
| 2015 | Yamaha | YFZ450R |
| 2014 | Yamaha | YFZ450R |
| 2013 | Yamaha | YFZ450R |
| 2012 | Yamaha | YFZ450R |
| 2011 | Yamaha | YFZ450R |
| 2010 | Yamaha | YFZ450R |
| 2009 | Yamaha | YFZ450R |
