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Complete Cylinder Head for 49 cc 4-stroke QMB139 engines with 8 m exhaust studs
Bolt Hole Spacing: 70.5 mm
Intake Port Diameter: 17.5 mm
Exhaust Port Diameter: 17 mm
Emission System: PAIR (Pulsed Secondary Air Injection System)
Intake and exhaust studs not included. Spark plug not included