FMF - Powercore4 Mufflers

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• We developed the PowerCore4 to increase the horsepower and torque throughout the entire power curve and give you a noticeable power increase that is very usable and beneficial, no matter what your riding style or ability is.
• Space Age internal packing for maximum packing life.
• Hi-Flo modular end cap.
• Internal shape of core uses Hi-Flo technology.
• Enhanced sonic evacuation provides for higher flow and increased power.