The Factory 4.1 RCT incorporates the latest in FMF Resonance Chamber Technology™ both internally and externally. In addition, they 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 the exacting specifications and is manufactured 100% at FMF's 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.
Make |
Model |
Year |
HUSABERG |
FE250 |
13-14 |
HUSABERG |
FE350 |
13-14 |
HUSABERG |
FE501 |
13-14 |
HUSQVARNA |
FE250 |
14-16 |
HUSQVARNA |
FE350 |
14-16 |
HUSQVARNA |
FE450 |
15-16 |
KTM |
250 SX-F |
09-15 |
KTM |
250 XC-F |
09,11,13-15 |
KTM |
250 XCF-W |
09-16 |
KTM |
350 SX-F |
11-15 |
KTM |
350 XC-F |
11-15 |
KTM |
350 XCF-W |
12-16 |
KTM |
400 XCW |
09-10 |
KTM |
450 EXC |
09-11 |
KTM |
450 EXCR |
08 |
KTM |
450 SMR |
13 |
KTM |
450 SX-F |
07-15 |
KTM |
450 SXF FACTORY EDITION |
12-14 |
KTM |
450 XCF |
09 |
KTM |
450 XC-F |
13-15 |
KTM |
450 XCRW |
08 |
KTM |
450 XCW |
09-10 |