18-24 YZ450F ANO TI FCT 4.1RCT SO W/CF

Huge weight savings Massive Power gains throughout the RPM range. 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 RTS (Rapid Tuning System) 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 incorporates FMF's Resonance Chamber Technology™ both internally and externally