FMF Racing

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...

The Factory 4.1 exhaust system with the Powerbomb header is FMF's premier exhaust system. This system is perfect for the track or dunes, and is used by factory teams such as KTM, Epic Can-Am and Rath...

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...

FMF Racing Factory 4.1 RCT Replacement Spiral Retaining Ring

FMF Racing Factory 4.1 RCT Replacement Wrap Decal

Replaces broken, worn and damages exhaust cone caps.

FMF Racing Factory 4.1 Titanium Replacement Rear Cone Cap

FMF Racing Factory 4.1 U.S.A. 2-Part Wrap Logo Decal Replacement (Do Not Make Kit)

Replacement quiet core insert for Factorcy 4.1/C systems.

Hand-pounded seams for superior flow, lighter gauge metal for the Factory sound.This Part Fits:YearMakeModelSubmodel2019-2026YamahaYZ85Base2022-2026YamahaYZ85 LWBase

Hand-pounded seams for superior flow, lighter gauge metal for the Factory sound.This Part Fits:YearMakeModelSubmodel1999-2026YamahaYZ250Base2024YamahaYZ250 50th Anniversary EditionBase2026YamahaYZ250...

The most copied pipe in the world and #1 best seller for FMF, the Fatty broadens the powerband and provides significant increases throughout.This Part Fits:YearMakeModelSubmodel1987-2006YamahaYFZ350...