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.
FMF Aluminum Factory 4.1 RCT (Slip-On) Carbon Fiber End Cap:
RCT (Resonance Chamber Technology) features a patented core shape that lowers decibels while maintaining maximum power output
Internal ducts in the chambers of the RCT system increase internal volume for improved exhaust flow, resulting in power gains throughout the entire range of power
FMF's Factory Forward Engineering centralizes mass and is less prone to crash damage
Innovative rear end cap features simple installation of tuning tip inserts or spark arrestor with the removal of four screws
Compatible with stock header or FMF header
Meet AMA and FIM sound requirements
Quiet Core 94db insert included
Spark arrestor included in muffler
Made in the U.S.A.
Spark Arrestor: Screen Insert (included)
Quiet Insert: 94dB Insert (included)
Weight: 5 lbs.
Fitment 2021-2022 Gas Gas MC 450 / EX 450F
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