KTM FMF Fatty Expansion Chamber

35 years of racing experience: The FMF factory pipes have been specially developed for the hardships of offroad life. That’s why they’re made from high quality, extra thick, hardwearing sheet steel. An elegant appearance is ensured by the nickel-plated, stainless, polished surface. For years and years.

Fitment: 85 / 105 SX 03-12


  • Broader and more usable rev range
  • Higher top speed
  • More traction, better control when accelerating
  • Including O-rings

For a perfectly tuned and performance-optimised overall system, we recommend combination with an FMF factory silencer.

KTM FMF Fatty Expansion ChamberSXS12085500


The nickel-plated surface of the KTM FMF Fatty Expansion Chamber gives it an overall polished appearance, but don’t let its sleek looks deceive you as this pipe can also withstand the heavy beating of harsh off-road rides.


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