FMF FACTORY FATTY EXPANSION CHAMBER [55505907001]

Untreated surface
Extra strong sheet steel
Wide, even engine speed range
Higher speed
More traction
Better gas control
Uncompromising race look

Combination with FMF silencer recommended

【300/250 SX 2019-2022】【300/250 XC 2019-2022】
【300/250 EXC 2020-2023】【300/250 XC-W 2020-2023】