FMF Racing Yamaha SS Aluminum 4.1 RCT S/O w/Carbon 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.

This Part Fits:

Year	Make	Model	Submodel
2019	Yamaha	WR450F	Base
2018-2021	Yamaha	YZ450F	Base
2019-2020	Yamaha	YZ450FX	Base