Description
The Factory 4.1 RCT incorporates FMF Resonance Chamber Technology both internally and externally In addition, achieves a shorter overall length that is less susceptible to crash damage and complementary to 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 exacting specifications and is manufactured 100% at the Southern California factory Includes the spark arrestor and quiet insert (94dB) – Honda CRF250R (2025); Honda CRF250RX (2025)






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