101 Octane Completely Assembled Emissions Style Cylinder Head for 50cc 4-stroke QMB139 engines with 64mm valves.
- Intake Port Diameter: 18mm
- Exhaust Port Diameter: 18mm
- Valve Length: 64mm
$54.99
101 Octane Completely Assembled Emissions Style Cylinder Head for 50cc 4-stroke QMB139 engines with 64mm valves.