150cc GY6 Cylinder Head, Type-2, Part #165-2

57mm Cylinder Head Type-2 for 150cc GY6 4-stroke ZNEN engines commonly found in Bintelli Gorilla Motor Works (GMW) and Puma scooters. Overall Height: 73mm. Bore Diameter: 57mm. Intake Port Diameter: 22.5mm. Exhaust Port Diameter: 24mm. Pre-Installed Valve Seats.