Universal Parts GY6 Lower Cooling Shroud for Emissions (PAIR) style 150cc and 125cc GY6 4-stroke QMI152/157 and QMJ152/157 engines.PAIR is an acronym for Pulsed Secondary Air Injection System which is found on your cylinder head. It is an emissions control system used to lower HC and CO emissions. It works by allowing air into the exhaust flow.
Please Note: Check the pictures carefully to insure compatibility with your engine. If you need a matched set of fan shrouds, please see part number 164-331 in Related Items.