2019 KX450F FACT 4.1 RCT FS TI CF END CAP

Includes spark arrestor screen insert Massive Power gains throughout the RPM range. Huge weight savings New RTS (Rapid Tuning System) Shorter overall length that is less susceptible to crash damage and complementary to FMF's 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 FMF's exacting specifications and is manufactured 100% at their Southern California factory The Factory 4.1 RCT incorporates FMF Resonance Chamber Technology™ both internally and externally Includes MegaBomb header