Get more power, less weight, and a tougher race-ready layout with the FMF Factory 4.1 RCT Slip-On Muffler. Designed around FMF’s Resonance Chamber Technology™ (RCT), it delivers massive power gains throughout the RPM range while keeping the system compact and responsive. 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 centralize mass for improved handling.
If you’re looking to refresh a tired exhaust or want a performance-focused upgrade without changing the entire system, this slip-on is an ideal solution. You gain stronger pull, reduce unnecessary weight, and get a high-end construction that’s built for demanding off-road use.
Key features:
✅ RCT (Resonance Chamber Technology™) integrated internally and externally for broad, usable power
✅ Short, crash-resistant design that helps keep the muffler protected and improves balance
✅ RTS (Rapid Tuning System) for quick tuning/servicing convenience
Benefits of use:
▹ More performance where it matters – strong gains across the RPM range, not just at peak
▹ Lighter feel on the bike – huge weight savings for quicker direction changes and less fatigue
▹ Premium durability & finish – built from aerospace-grade materials to demanding specifications
Technical specifications:
• Brand: FMF
• Model: Factory 4.1 RCT
• Type: Slip-On Muffler
• Materials: Carbon Fiber / Stainless Steel (with aluminum muffler construction as listed)
• End cap material: Carbon Fiber
• Pipe material: Stainless Steel
• Finish: Raw
• Vendor part number: 042374
• Unit: Each
Why choose this product?
⭐ Performance-focused design with proven FMF RCT technology
⭐ Built for riders who want real gains plus weight reduction in one upgrade
⭐ Smart, compact layout that helps reduce crash vulnerability while improving handling feel
