This GL0539 Starter Drive is a premium aftermarket spare corresponding to OE reference S21-3708100 with a 45.2mm outer diameter. Built using wear-resistant quenched alloy steel, the unit withstands persistent friction and variable loads during repeated startup. Precision CNC machining achieves accurate sizing for seamless fitting. It serves as an ideal replacement for damaged starter drives and restores stable cranking torque for reliable engine ignition.
OEM: S21-3708100
APPLICATION:
One-way clutch outer diameter: 45.2
Gear tooth tip: 27.2
Bushing inner diameter: 12
Overall length: 59.4
Gear teeth number: 9
Spline number: 8
Fork width: 12.2
Rotation: CCW