Boyesen Rad Valve Polaris

Maintain flow velocity through the valve and redirect intake charge for more even distribution to intake ports
Provide quicker, sharper throttle response and more horsepower throughout rpm range
Specially-designed reed cage holds Boyesen’s patented dual-stage reeds
Boyesen’s hot RAD valves ratchet up your torque
One-piece cast aluminum bolts in easily
Order one set per cylinder