2009-2022 Yamaha YFZ450R / YFZ450X FMF Racing Factory 4.1 Rct W/Ss Megabomb Exhaust Header

The Factory 4.1 RCT incorporates the latest in FMF Resonance Chamber Technologyboth internally and externally. In addition, we achieve a shorter overall length that is less susceptible to crash damage and complementary to our 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 our exacting specifications and is manufactured 100% at our Southern California factory.

-Available in Natural Aluminum Muffler with Carbon End Cap 

-Massive Power gains throughout the RPM range.

-Huge weight savings

-New RTS (Rapid Tuning System)

-FMF uses the highest quality proprietary blend of alloy grade titanium made especially to our standards.

Part Number: 44438