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 Natural Aluminum 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 especially to our standards.
Fitment:
Make |
Model |
Year |
GAS GAS |
EC250F |
21 |
GAS GAS |
EC350F |
21 |
HUSQVARNA |
FE250 |
20-21 |
HUSQVARNA |
FE350 |
20-22 |
|
|
|
HUSQVARNA |
FE450 |
20-23 |
HUSQVARNA |
FE501 |
20-22 |
KTM |
350 XCF-W |
20-22 |
KTM |
450 XCF-W |
20-23 |
KTM |
500 XCF-W |
20-22 |