Factory 4.1 RCT Slip-On Muffler

Boost power and sharpen your bike’s feel with the FMF Factory 4.1 RCT Slip-On Muffler. Built around FMF’s Resonance Chamber Technology™ (RCT), it delivers massive power gains throughout the RPM range while cutting significant weight compared to stock systems. Its shorter overall length and Factory Forward Engineering help protect the exhaust in crashes and centralize mass by positioning the muffler closer to the engine—making the bike feel more responsive and balanced.

If you want stronger pull, improved throttle response, and a premium slip-on that’s designed and manufactured to demanding standards, the Factory 4.1 RCT is a proven upgrade for serious off-road riding.

Key features:

• ✅ Resonance Chamber Technology™ (RCT) for broad, usable power
• ✅ Shorter, more crash-resistant design with centralized mass (Factory Forward Engineering)
• ✅ RTS (Rapid Tuning System) for quick tuning changes

Benefits of use:

• 🔹 More performance across the rev range—not just peak power
• 🔹 Lighter exhaust feel for improved handling and agility
• 🔹 Premium build quality using aerospace-grade materials, made in FMF’s Southern California facility

Technical specifications:

• 📌 Type: Slip-On muffler
• 📌 Materials: Aluminum muffler with stainless steel pipe
• 📌 End cap material: Carbon fiber

Why choose this product?

• ⭐ Designed for riders who want real-world power gains and huge weight savings
• ⭐ Built with high-end materials to meet FMF’s exacting specifications
• ⭐ Track-proven FMF technology with a compact design that’s less susceptible to crash damage