FMF Factory 4.1 RCT Slip-On Mufflers -

FMF Factory 4.1 RCT Slip-On Mufflers



  • The Factory 4.1 RCT incorporates FMF Resonance Chamber Technology™ both internally and externally
  • In addition, FMF achieves a shorter overall length that is less susceptible to crash damage and complementary to their 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 FMF's exacting specifications and is manufactured 100% at their Southern California factory
  • Race Team tested and approved
  • Tailored for maximum performance
  • Greater canister volume for reduced sound and increased packing life