The SM 6124 Starter EGT (Epicyclic Gear Train) Gear Set is a heavy-duty internal component kit specifically engineered for large-scale Lucas-style (L. Type) reduction starter motors. Unlike standard automotive sets, this configuration features four planetary gears to distribute the massive rotational load required to crank high-displacement commercial engines. Manufactured from high-density, heat-treated alloy steel, these gears are built to handle the immense torque and mechanical stress typical of heavy-duty trucks and industrial powertrains.