FMF Factory 4.1 RCT silencer 4-stroke 250-350 (SX, XC) 23-25Silencer housing made of high grade titanium Carbon silencer cap Mounting also possible with original header Significantly more torque Substantial weight saving Noticeable performance enhancement Blue anodised outer sleeve In connection with an FMF Megabomb header even further increase in rideability and power output can be achieved. Approvals: CCCUO_EU, FIM Colour: blue Factory Racing: USED BY FACTORY RACING Surface: Anodized Material: Carbon,