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.
NOTE: This accessory is restricted to closed-course competition use. See California Regulations regarding Emission-Related Parts and Accessories for products for closed-course competition use only.
Select the Products You Want...
Ready to Buy?
North Ridge Yamaha
5929 North Ridge West (Route 20)
Geneva, OH 44041-9665
Phone: (440) 466-2712