Boost performance and sharpen handling with the FMF Factory 4.1 RCT Slip-On Muffler. Designed with FMF’s Resonance Chamber Technology (RCT) both internally and externally, it delivers strong, usable power gains across the entire RPM range. The shorter overall length is less susceptible to crash damage and supports FMF’s Factory Forward Engineering by moving the muffler closer to the engine to help centralize mass for a more responsive feel.
Built from aerospace-grade materials and manufactured 100% in FMF’s Southern California factory, this slip-on is made for riders who want race-proven performance, durability, and premium construction.
Key features:
✅ RCT technology for improved power delivery and refined performance
✅ Shorter, forward-positioned design to reduce crash exposure and improve mass centralization
✅ RTS (Rapid Tuning System) for quick tuning and adjustments
Benefits of using it:
🔹 More power throughout the rev range for stronger acceleration and pull
🔹 Huge weight savings to help the bike feel lighter and more agile
🔹 Premium build quality with materials chosen for performance and long-term durability
Technical specifications (if needed):
📌 Type: Slip-On muffler
📌 Materials: Aluminum muffler, stainless steel pipe, carbon fiber end cap
📌 Finish/Color: Raw
📌 Brand/Model: FMF Factory 4.1 RCT
📌 Vendor part number: 042291
Why choose this product/service?!
⭐ Race-inspired design built with aerospace-grade materials and tight manufacturing standards
⭐ Made in the USA (FMF Southern California factory)
⭐ A proven upgrade for riders who want real performance gains with reduced weight
