06-09 YZ250F/06-09 YZ450F P-CORE 4 SO W/
- Developed to increase the horsepower and torque throughout the entire power curve producing a noticeable power increase that is usable and compatible with every style of riding
- Removable spark arrestor included
- Aluminum construction and stainless steel Hi-Flo end caps make for the perfect balance of performance and strength
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