- 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)
Yamaha -- YFZ 450R 4x2 -- (2010, 2014, 2013, 2012, 2009, 2011, 2015, 2016, 2017, 2019, 2018, 2021, 2022, 2020); Yamaha -- YFZ 450 X 4x2 -- (2010, 2011)