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
Can be used with FMF or Stock OEM Header.
Recommended mapping spec available for 450 SX-F. (available from authorized KTM Dealer)
- 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 FMFs 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