The PowerCore®4 is designed 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 your riding style or ability. Features include space age internal packing for maximum packing life and a high-flow modular end cap. Internal core shape uses high-flow technology. Enhanced sonic evacuation provides for higher flow and increased power. Muffler includes removable spark arrestor. 97.5 dBA sound level. 95.5 dBA with QuietCore™ Spark Arrestor Insert, sold separately. This accessory is restricted to closed-course use.
