The FMF Factory 4.1 RCT Full Exhaust System is designed to boost performance where it matters—delivering strong, usable power gains throughout the entire RPM range while shedding significant weight compared to stock. Its shorter overall length helps reduce the chance of crash damage, and FMF’s Factory Forward Engineering places the muffler closer to the engine to centralize mass for improved handling feel.
If you’re looking to sharpen throttle response, improve acceleration and reduce overall bike weight without sacrificing build quality, this system is a proven upgrade. Constructed from aerospace-grade materials and manufactured 100% in FMF’s Southern California factory, it’s built for riders who demand race-level performance and durability.
Key features:
✅ FMF Resonance Chamber Technology™ (RCT) internally and externally
✅ Shorter design + centralized mass with Factory Forward Engineering
✅ Includes MegaBomb header and spark arrestor screen insert
Benefits of use:
🔹 Massive power gains across the RPM range for faster lap times and stronger pull
🔹 Huge weight savings to improve agility and reduce rider fatigue
🔹 Rapid, practical tuning with the RTS (Rapid Tuning System)
Technical specifications (as provided):
📌 Type: Full System (muffler + header)
📌 Pipe material: Stainless steel (MegaBomb header included)
📌 Muffler material: Aluminum; end cap: Carbon fiber; finish: Raw
Why choose this product?
⭐ Premium, aerospace-grade construction made to FMF’s exacting specifications
⭐ Manufactured 100% at FMF’s Southern California facility
⭐ Note: will not pass 2025 FIM sound regulation
