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KTM FMF Factory 4.1 RCT Muffler KTM MX 2009-2016

This OEM part usually ships in 5-7 business days.

*This item has been discontinued by KTM*

Exclusive muffler for KTM PowerParts used by our factory offroad team. The Factory 4.1 RCT incorporates the latest in FMF Resonance Chamber Technology™ both internally and externally. In addition, we achieve a shorter overall length that is less susceptible to crash damage and complementary to our Factory Forward Engineering 

» Moving the muffler closer to the motor to centralize mass. The Factory 4.1 RCT is constructed from only aerospace grade materials that meet our exacting specifications and is manufactured 100% at FMF’s Southern California factory.
» Natural Titanium Muffler with Titanium End cap
» New RTS (Rapid Tuning System)
» Significant weight savings
» FMF uses the highest quality proprietary blend of alloy grade titanium made especially to our standards.

Can be used with FMF or Stock OEM Header.

  • AMA Amateur
  • Closed Course Competition Use Only
  • Titanium


  • KTM 250 SX-F 2009-2015
  • KTM 250 XC-F 2009-2015
  • KTM 250 XCF-W 2009-2016
  • KTM 350 SX-F 2011-2015
  • KTM 350 XC-F 2011-2015
  • KTM 350 XCF-W 2012-2016
  • KTM 450 SX-F 2009-2015
  • KTM 450 XC-F 2009-2015
  • KTM 500 EXC 2013
  • KTM 500 XC-W 2015



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

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