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 our Southern California factory.

• Highest-quality proprietary blend of alloy grade titanium


• Blue anodized titanium muffler with carbon end cap


• Massive power gains throughout the RPM range


• Rapid Tuning System (RTS)

Fitment:
KTM 250 EXC-F Base 2017 to 2019
KTM 250 SX-F Base 2016 to 2018
KTM 250 SX-F Factory Edition Base 2015 to 2016
KTM 250 XC-F Base 2016 to 2018
KTM 350 EXC-F Base 2017 to 2019
KTM 350 SX-F Base 2016 to 2018
KTM 350 XC-F Base 2016 to 2018
KTM 450 EXC-F Base 2018 to 2019
KTM 450 SX-F Base 2016 to 2018
KTM 450 SX-F Factory Edition Base 2015 to 2017
KTM 450 XC-F Base 2016 to 2018
KTM 500 EXC-F Base 2017 to 2019