20-22 YZ450F EXHAUST FCTRY4:1RCT ALMCF
- Includes spark arrestor screen insert
- New RTS (Rapid Tuning System)
- Huge weight savings
- Massive Power gains throughout the RPM range.
- 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
- 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
- Includes MegaBomb header
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