FMF 044456 Factory 4.1 RCT Full Exhaust System with MegaBomb Header Aluminum

The FMF Factory 4.1 RCT Full Exhaust System represents the pinnacle of motocross exhaust engineering, combining advanced Resonance Chamber Technology with a complete system design for maximum performance gains. This complete system includes a stainless steel MegaBomb header paired with a natural aluminum muffler featuring a carbon fiber end cap, delivering significant power increases throughout the entire RPM range while maintaining race-compliant sound levels.

Key Features:

• Resonance Chamber Technology (RCT) utilizes a patent-pending core shape that enhances exhaust pressure waves for optimal power output while reducing sound levels
• MegaBomb header design improves exhaust flow and enhances low- to mid-range power delivery with noticeably improved throttle response
• Factory Forward Engineering moves the muffler closer to the motor to centralize mass and reduce susceptibility to crash damage
• Aerospace-grade aluminum construction with stainless steel midpipe for exceptional strength-to-weight ratio
• Carbon fiber end cap with Rapid Tuning System (RTS) allows quick sound insert changes with simple four-screw removal
• Includes 94dB QuietCore insert and US Forestry-approved spark arrestor screen insert
• Weighs just 13.6 lbs for significant weight savings over stock exhaust systems
• Manufactured 100% in Southern California to FMF's exacting specifications

This complete exhaust system delivers massive power gains across the entire RPM range while remaining quieter than stock. The internal ducts within the RCT chambers increase internal volume for improved exhaust flow, resulting in enhanced performance throughout the powerband. The system meets AMA and FIM sound requirements, making it legal for closed course competition use. Natural aluminum finish with carbon fiber end cap provides a race-ready appearance that matches professional-level performance.