55505907001

KTM FMF Factory Fatty Expansion Chamber 250/300 SX/XC/XC-W 2019-2023

#9 Best Seller
in FMF
This OEM part usually ships in 5-7 business days.
  • 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

Approvals
  • Closed Course Competition Use Only

Material     

  • Stainless steel 

Surface     

  • Natural/untreated 

Factory Racing     

  • USED BY FACTORY RACING 

    FITMENT

    • KTM 250 SX 2019-2020
    • KTM 250 XC 2019
    • KTM 250 XC TPI 2020-2022
    • KTM 250 XC-W 2023
    • KTM 250 XC-W TPI 2020-2022
    • KTM 300 XC 2019
    • KTM 300 XC TPI 2020-2022
    • KTM 300 XC-W 2023
    • KTM 300 XC-W Six Days TPI 2020
    • KTM 300 XC-W TPI 2020-2022

    PROPOSITION 65

    ⚠️WARNING

    This product can expose you to chemicals known to the State of California known to cause Cancer or birth defects and reproductive harm. For more information go to: https://oehha.ca.gov/proposition-65

    be the first to know

    • 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

    Approvals
    • Closed Course Competition Use Only

    Material     

    • Stainless steel 

    Surface     

    • Natural/untreated 

    Factory Racing     

    • USED BY FACTORY RACING 
      • KTM 250 SX 2019-2020
      • KTM 250 XC 2019
      • KTM 250 XC TPI 2020-2022
      • KTM 250 XC-W 2023
      • KTM 250 XC-W TPI 2020-2022
      • KTM 300 XC 2019
      • KTM 300 XC TPI 2020-2022
      • KTM 300 XC-W 2023
      • KTM 300 XC-W Six Days TPI 2020
      • KTM 300 XC-W TPI 2020-2022

      ⚠️WARNING

      This product can expose you to chemicals known to the State of California known to cause Cancer or birth defects and reproductive harm. For more information go to: https://oehha.ca.gov/proposition-65

      The fitting instructions for KTM PowerParts can be accessed online. Go to www.ktm.com/manuals and enter the part # under the "POWERWEAR & POWERPARTS MANUALS" section to access the owner's manual (fitting instructions) for this part.