Factory 4.1 RCT Exhaust System

FMF Factory 4.1 RCT Exhaust System is designed for riders who want a premium race exhaust with smart packaging and high-end materials. By incorporating FMF Resonance Chamber Technology™ (RCT) both internally and externally, it’s engineered to deliver competitive performance characteristics while keeping a compact, modern profile.

The shorter overall length helps reduce the chance of crash damage and supports mass centralization by moving the muffler closer to the engine—an approach that complements Factory Forward-style layouts. Built from aerospace-grade materials and manufactured 100% in Southern California, it’s a serious upgrade for closed-course riding.

Key features:

• ✅ RCT (Resonance Chamber Technology™) incorporated internally and externally
• ✅ Shorter design to help minimize crash damage and centralize mass
• ✅ Premium construction using aerospace-grade materials, made in the USA

Benefits of use:

• 🔹 Race-focused setup built for competitive riding and performance-oriented builds
• 🔹 More resilient packaging thanks to reduced overall length
• 🔹 High-end materials & manufacturing for riders who demand top-tier components

Technical specifications:

• 📌 Brand: FMF
• 📌 Model: Factory 4.1 RCT
• 📌 Design/Configuration: 1-Into-1 System
• 📌 Pipe material: Stainless Steel
• 📌 End cap material/finish: Carbon Fiber / Black
• 📌 Type: Race
• 📌 Vendor part number: 042413

Why choose this exhaust system?

• ⭐ Premium FMF race technology with RCT design
• ⭐ Built with exacting aerospace-grade material standards
• ⭐ Ideal for riders looking for a compact, performance-focused full system

Note: For closed course competition use only. Will not pass 2025 FIM sound regulation.