FMF developed the PowerCore 4 to increase the horsepower and torque throughout the entire power curve and give noticeable power increase that is very usable and beneficial, no matter what your riding style or ability is.
- Completely redesigned for all late model applications.
- 98dB sound level with 94dB insert available for purchase.
- Use with FMF or Stock header.
- Removable spark arrestor included.
- Space Age internal packing for maximum packing life