FMF 041610 Factory 4.1 RCT Slip-On Exhaust Stainless Steel Aluminum Muffler Carbon End Cap

The FMF Factory 4.1 RCT Slip-On Exhaust represents the pinnacle of motocross exhaust engineering, incorporating FMF's proprietary Resonance Chamber Technology both internally and externally. This advanced exhaust system delivers massive power gains throughout the RPM range while maintaining compliance with AMA and FIM sound requirements.

Key Features:

• Natural aluminum muffler construction with stainless steel midpipe and carbon fiber end cap
• Patented core shape lowers sound levels while maintaining maximum power output
• Patented canister shape increases internal volume for enhanced sound absorption and longer packing life
• Factory Forward Engineering design moves muffler closer to motor to centralize mass and reduce crash damage susceptibility
• Constructed from aerospace-grade materials meeting FMF's exacting specifications
• Manufactured 100% in FMF's Southern California facility
• Innovative rear end cap design allows easy customization with tuning tip inserts or spark arrestor
• Maintenance simplified with 4-screw front end cap removal
• Includes QuietCore 94dB insert and spark arrestor screen insert
• Significant weight savings over stock exhaust systems

Race team tested and approved, this slip-on exhaust delivers optimized core specifications tuned specifically for each application. The patented chamber design enhances and refines exhaust pressure for maximum performance across all riding conditions.

Note: Closed course use only.