Description
If you’re serious about extracting maximum power from your machine while cutting unnecessary weight, the FMF Factory 4.1 RCT delivers measurable gains across the entire RPM range. Its compact design centralizes mass closer to the motor—improving handling balance and reducing vulnerability to crash damage. Built entirely from aerospace-grade materials in FMF’s Southern California facility, this muffler represents the engineering standard that separates premium performance from off-the-shelf compromises.
- Anodized titanium construction
- Resonance Chamber Technology™
- Shorter overall length
- Factory Forward Engineering
- Centralized mass positioning
- Significant power gains
- Substantial weight reduction
- Rapid Tuning System (RTS)
- 100% Southern California manufactured
- Aerospace-grade materials
- MPN: 045648






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