The Factory 4.1 RCT incorporates the latest in FMF Resonance Chamber Technology™ both 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 FMF’s Southern California factory.
FEATURES
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.
BIKE FITMENT
If your bike is listed below, this product will suit it. Click your manufacturer to expand the list.
YAMAHA
Yamaha WR450F 2020
Yamaha WR450F 2021
