Arai's PED (Performance Enhancement Devices) Kit is available for the Arai GP Helmets. The PED is designed to reduce lift and turbulence at high speeds by regulating the air stream OVER the helmet. The kit also increases the ventilation effect by directing more air into the ventilation slots at the front and increases the Venturi exhaust at the rear. The PED Kit is available in Clear plastic to allow the paint on your helmet to shine through or it can be painted to accent your current helmet theme. Very easy to install this highly effective 2 - piece Performance Enhancement Device.