Tractor-like bottom end pull, thicker midrange and rugged 18-gauge steel construction.This Part Fits:YearMakeModelSubmodel1999-2021YamahaYZ250Base2016-2021YamahaYZ250XBase

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:YearMakeModelSubmodel1999-2021YamahaYZ250Base

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:YearMakeModelSubmodel2002-2021YamahaYZ125Base2020-2021YamahaYZ125XBase

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:YearMakeModelSubmodel2002-2018YamahaYZ85Base

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:YearMakeModelSubmodel2014-2021KawasakiKX100Base2022KawasakiKX112Base2014-2021KawasakiKX85Base

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 BansheeBase

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:YearMakeModelSubmodel1985-1986HondaATC250RBase