The Factory 4.1 RCT incorporates FMF Resonance Chamber Technology™ both internally and externally
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
Massive Power gains throughout the RPM range.
Huge weight savings
New RTS (Rapid Tuning System)
Includes MegaBomb header
Includes spark arrestor screen insert
FITS 2021 KAWASAKI KX 450X, 2019-2022 KAWASAKI KX 450 F
