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 benefi -
cial no matter what your riding style or ability is. Features
include space-age internal packing for maximum packing
life. High-fl ow modular end cap. Internal core shape uses
high-fl ow technology. Enhanced sonic evacuation provides
for higher fl ow and increased power. Includes removable
spark arrestor.Note: This accessory affects emissions; installation on EPA-regulated 2006 or later WR models constitutes unlawful tampering except when used solely for closed-course
competition. YZ models are for closed-course use regardless of modification.
Note: This performance accessory does not meet California standard for off-road recreational vehicle usage regardless of model year.
