Universal Parts QMB139 Non Emissions Head - 64mm Valves $39.99 Quantity discounts available QuantityPrice SKU: 151-253 This item is IN STOCKCurrent Stock: 2 Quantity -+ Add to Cart Details Universal Parts Completely Assembled Non Emissions Style Cylinder Head with 64mm Valves Specs Intake Port Diameter: 17mm Exhaust Port Diameter: 18mm Valve Length: 64mm Supported Models QMB139 50cc/49cc DetailsSpecsSupported Models Back Universal Parts Completely Assembled Non Emissions Style Cylinder Head with 64mm Valves for 50cc 4-stroke QMB139 engines. Back Intake Port Diameter: 17mmExhaust Port Diameter: 18mmValve Length: 64mm Back QMB139 50cc/49cc