Bike Fitment:

• Husqvarna FC 350 2025
• Husqvarna FC 450 2023–2025
• Husqvarna FC 450 Rockstar Edition 2022–2024
• Husqvarna FX 450 2023–2024

The FMF 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. 

• Blue Anodized Titanium Muffler with Carbon End Cap.
• New RTS (Rapid Tuning System).
• Significantly lighter than OEM Muffler.
• 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.
• Closed course/competition use only.