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Bill Randall, President
Fun & Functional Transportation
57mm PAIR System Cylinder Head for 150cc GY6 4-stroke engines.
PAIR is an acronym for Pulsed Secondary Air Injection System. It is an emissions control system used to lower HC and CO emissions. It works by allowing air into the exhaust flow.
Fits 57mm cylinder bore
Intake Port Diameter: 25mm
Exhaust Port Diameter: 24mm
Emission Control System: Pulsed Secondary Air Injection System(PAIR)
GY6 QMI/QMJ 152/157, Various unlisted makes/models
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