Naraku GY6 59mm Cylinder Head

Naraku GY6 Complete Cylinder Head for 160-180cc Big Bore GY6 4-stroke engines and engine based vehicles. Enlarged 59mm Combustion Chamber.Please see our Warranty & Returns Policy. Exhaust Valve Diameter: 23mm Intake Valve Diameter: 27.75mm Exhaust Port Diameter: 26.5mm Intake Port Diameter: 27.5mmOverall Height: 61.75mmStud Spacing: 76.7mm