SSP-G GY6 61mm Complete Cylinder Head for 150cc and 125cc GY6 4-stroke engines and engine based vehicles.

• Exhaust Valve Diameter: 23mm
• Intake Valve Diameter: 27.75mm
• Exhaust Port Diameter: 26.5mm
• Intake Port Diameter: 27.5mm

GY6 QMI/QMJ 152/157, Various unlisted makes/models