- 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)
KTM -- 250 SX-F FE -- (2015); KTM -- 450 SX-F FE -- (2015); Husqvarna -- FC 250 -- (2016); Husqvarna -- FC 450 -- (2016); Husqvarna -- FC 350 -- (2016)