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Powercore 4 Slip-ON

The original and still best bang for the buck - the PowerCore 4 S/A.  This is a race design muffler at a value price.  It features our exclusive Hi-Flo square core to evacuate exhaust better and provide maximum core surface area for sound absorption.  The Hi-Flo technology is evident in the stainless steel formed endcaps as well.  For maximum tunability, the PowerCore 4 for a number of applications has a highly versatile modular rear endcap for optional performance accessories – a 2” or 1-3/4” endcap for smoother power delivery, a quiet core insert for the sound conscientious and a replacement spark arrestor screen. Some applications feature a fixed endcap and do not allow for optional performance accessories or a quiet core insert. For further information please contact our Customer Service Representatives by phone.  Performance, versatility and pounds lighter than stock – all for an affordable price, FMF’s PowerCore 4…FEEL THE POWER!

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.




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