FMF Fatty Expansion Chamber Works Finish KTM 125 & 150 SX #50505907001

Broader, Smoother Power For Your KTM 125 or 150 SX ,Genuine KTM Powerpart these FMF Fatty Expansion Chamber's Are Made from high quality materials with a nickel plated surface.

• Made of high quality, extra strong and durable steel
• Untreated surface for an unadulterated factory look
• Broader, smoother powerband
• Higher speed
• More traction, better throttle control
• Complete with o-rings
• Combination with FMF silencer recommended