FMF 044500 Factory 4.1 RCT Titanium Anodized Full Exhaust System with Carbon End Cap

The FMF Factory 4.1 RCT Full Exhaust System (MPN: 044500) is a premium titanium full exhaust system built for 4-stroke dirt bikes and off-road motorcycles. Constructed from a proprietary blend of alloy-grade titanium and manufactured 100% in FMF's Southern California factory, this system delivers serious performance gains without compromising reliability or sound compliance.

At the heart of the Factory 4.1 RCT is FMF's proprietary Resonance Chamber Technology (RCT), which works both internally and externally to optimize exhaust pressure waves. The patented core shape lowers decibel output while simultaneously maximizing power delivery across the entire RPM range. Internal ducts within the RCT chambers increase internal volume for improved exhaust flow and throttle response.

The system features FMF's MegaBomb titanium header, engineered to allow exhaust gases to expand, cool, and re-accelerate at higher velocity — delivering the torque gains of a long header combined with the top-end response of a short header. FMF's Factory Forward Engineering moves the muffler closer to the motor, centralizing mass for improved handling and reducing exposure to crash damage.

Key Features:

• Blue anodized titanium muffler with carbon fiber end cap
• Titanium MegaBomb header and mid-pipe
• RCT (Resonance Chamber Technology) — patented core design lowers dB without sacrificing power
• Massive power gains throughout the full RPM range
• Significant weight savings over stock exhaust
• Factory Forward Engineering centralizes mass and reduces crash vulnerability
• New RTS (Rapid Tuning System) for tool-free sound insert changes
• QuietCore 94dB insert included
• USFS-approved spark arrestor screen insert included
• Meets AMA and FIM sound requirements
• All required mounting hardware and installation instructions included
• Made in the USA

The Factory 4.1 RCT is the exhaust of choice for serious off-road and motocross competitors, and has earned its reputation as the #1 exhaust in AMA Supercross, AMA Motocross, and FIM Motocross of Nations. Item ID: 044500.