FMF 20-22 YZ450F EXHAUST FCTRY4:1RCT ALMCF

Includes MegaBomb header

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 spark arrestor screen insert