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.
- Available in Blue Anodized Titanium Muffler with Carbon End Cap
- Massive Power gains throughout the RPM range.
- Huge weight savings
- New RTS (Rapid Tuning System)
- FMF uses the highest quality proprietary blend of alloy grade titanium made specifically to our standards.
PN# 045648
Fitment
GasGas
2023: EC 350F
2022: EC 350F
2021: EC 250F, EC 350F
Husqvarna
2023: FE 250, FE 350, FE 450, FE 501
2022: FE 250, FE 350, FE 450, FE 501
2021: FE 250, FE 350, FE 450, FE 501
2020: FE 250, FE 350, FE 450, FE 501
KTM
2023: 350 XCF-W, 450 XCF-W, 500 XCF-W
2022: 350 XCF-W, 500 XCF-W
2021: 350 XCF-W, 500 XCF-W
2020: 350 XCF-W, 500 XCF-W