FMF Factory 4.1C PowerBomb Exhaust System * The lightest full system available featuring the best carbon fiber on the market * Muffler easily serviced for repacking * 94dB Insert Included * Superior power and performance - horsepower improved throughout RPM range * Features exclusive proprietary Chamber Core and PowerBomb technology * Factory Forward Engineering centralizes mass, improves handling * Carbon muffler with titanium endcap, midpipe and PowerBomb header * Made from premium quality American materials * Performance tuning inserts and spark arrestor module available * Meets AMA sound requirements on most models; inserts available for others