It is an emissions control system used to lower HC and CO emissions. Please Note : Check the pictures carefully to insure compatibility with your engine. COOLING FAN COVER WITH UPPER AND LOWER SHROUD FOR 150cc GY6 *NON-EGR... PAIR is an acronym for Pulsed Secondary Air Injection System which is found on your cylinder head. PAIR is an acronym for Pulsed Secondary Air Injection System which is Let's talk about fans and shrouds on gy6 engines | Scooter Forums Gy6 Lower Cooling Shroud - Emissions System Univesal Pats GY6 Lowe Cooling Shoud - Emissions, Fo GY6 Scooter 3455 Gy6 Lower Cooling Shroud - Emissions Pipe It is an emissions control system used to lower HC and CO emissions. I Faros de LED de largo alcance + antinieblas de Kawasaki Mule 3000 / 3010 It works by allowing air into the exhaust flow.
