Exclusive muffler for KTM PowerParts used by Troy Lee and BTO KTM teams. 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.
» Blue Anodized Titanium Muffler with Carbon End Cap
» New RTS (Rapid Tuning System)
» FMF uses the highest quality proprietary blend of alloy grade titanium made especially to our standards.
» WHEN PAIRED WITH TITANIUM HEAD AND MID PIPE WEIGHT SAVINGS = 2.5lbs LIGHTER ON 16’ 250 SX-F AND 2.6lbs LIGHTER ON 450 SX-F
Can be used with FMF or Stock OEM Header.
Recommended mapping spec available for 450 SX-F. (available from authorized KTM Dealer)
- AMA Amateur Racing Sound Compliant
- Closed Course Competition Use Only
- KTM 250 SX-F 2016-2018
- KTM 250 XC-F 2016-2018
- KTM 350 SX-F 2016-2018
- KTM 350 XC-F 2016-2018
- KTM 450 SX-F 2016-2018
- KTM 450 XC-F 2016-2018
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