The FMF Factory 4.1 RCT Slip-On Muffler is built to deliver massive power gains throughout the RPM range while dropping weight for a more responsive, better-handling bike. Thanks to FMF’s Resonance Chamber Technology™ (RCT) used internally and externally, you get a strong, rideable performance increase that helps your bike pull harder and feel smoother across the revs.
Its shorter overall length is designed to be less susceptible to crash damage, and it complements FMF’s Factory Forward Engineering by positioning the muffler closer to the motor to help centralize mass—an advantage you can feel in quicker direction changes and improved balance.
Key features:
✅ FMF Resonance Chamber Technology™ (RCT) used internally and externally
✅ Shorter overall length to help reduce crash damage and improve mass centralization
✅ Constructed from aerospace-grade materials and manufactured 100% in Southern California (USA)
✅ Massive power gains throughout the RPM range
✅ Huge weight savings vs. stock systems
✅ RTS (Rapid Tuning System) for quick tuning/service
Benefits of use:
🔹 Stronger acceleration and improved throttle response across the rev range
🔹 Lighter exhaust feel for better agility and reduced rider fatigue
🔹 More durable, race-focused design that’s better protected in off-road crashes
Technical specifications (if needed):
📌 Brand: FMF
📌 Model: Factory 4.1 RCT
📌 Type: Slip-On muffler
📌 Muffler/pipe material: Titanium
📌 End cap material: Carbon fiber
📌 Finish/color: Anodized blue
📌 Vendor part number: 044455
📌 Units: Each
Why choose this product?
⭐ Premium FMF racing development with RCT technology for real performance gains
⭐ Aerospace-grade titanium build for high strength-to-weight and top-end finish quality
⭐ Smart design choices (shorter length + mass centralization) made for aggressive off-road riding
