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Insane Value Fmf Factory Fatty Expansion Chamber 50505907001 In Multiple Colors [USrpmxKZ]

$54.99 $175.99 -69%

Insane Value Fmf Factory Fatty Expansion Chamber 50505907001 In Multiple Colors [USrpmxKZ] Extra strong sheet steel Untreated surface Wide, even engine speed range Higher speed More traction Better gas control Uncompromising race look Combination with FMF silencer recommended Fits Fits the fo

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Insane Value Fmf Factory Fatty Expansion Chamber 50505907001 In Multiple Colors [USrpmxKZ]

Insane Value Fmf Factory Fatty Expansion Chamber 50505907001 In Multiple Colors [USrpmxKZ]

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

Combination with FMF silencer recommended

Fits

Fits the following KTM bike models:

  • 250 SX 2019 – 2022

Part Number:

?55505907001

What Our Customers Say

February 6, 2026

Absolutely no complaints!

A great tool that is very useful.

- Vaughan M..

February 6, 2026

Absolutely no complaints!

A wise purchase that performs well.

- Wilbur Y..

February 6, 2026

Absolutely no complaints!

It's a very solid and effective tool.

- Sabra Y..

Write a Review

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