The FMF Factory 4.1 RCT Full Exhaust System is designed for riders who want race-level performance with premium materials and smart engineering. By integrating FMF Resonance Chamber Technology (RCT) internally and externally, it delivers massive power gains throughout the RPM range while also cutting weight for a more responsive feel.
Its shorter overall length helps reduce the risk of crash damage, and FMF’s Factory Forward Engineering moves the muffler closer to the engine to centralize mass—improving balance and handling on track or trail. Built from aerospace-grade materials and manufactured in FMF’s Southern California factory, it’s made to meet demanding riding conditions.
Key features:
✅ FMF Resonance Chamber Technology™ (RCT) for broad, usable power
✅ Shorter, more compact system to reduce crash exposure and improve mass centralization
✅ Aerospace-grade titanium construction with carbon-fiber end cap
Benefits of use:
🔹 Strong performance improvement across the rev range for faster acceleration and better pull
🔹 Reduced weight helps the bike feel lighter and more agile in corners and transitions
🔹 RTS (Rapid Tuning System) makes tuning and setup changes quicker and easier
Technical specifications:
📌 Type: Full System
📌 Materials: Titanium (muffler + pipe), Carbon Fiber (end cap)
📌 Includes: MegaBomb header, spark arrestor screen insert, 94 dB insert
Why choose this product?
⭐ Proven FMF performance with premium, race-focused construction
⭐ Designed to improve power delivery while saving weight and enhancing handling feel
⭐ Complete kit with header and inserts included for a ready-to-install upgrade
Note: Will not pass 2025 FIM sound regulation.
