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FMF - Powercore 4 Muffler(some models have a spark arrestor)
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.
I'm very happy with the FMF set up it delivers great power. My bike is very responsive on the throttle exactly what I need when I ride the track and races. BTO makes it quick fast and easy to find parts. I purchase everything that I need for my bike on BTO.
Bottom Line Yes, I would recommend this to a friend