The SM 2013 is a heavy-duty Alternator Rotor (Armature Assembly) specifically designed for the high-output alternators found in Sino Truck (CNHTC) vehicles, such as the Howo and Steyr series, equipped with Weichai (WD615 / WP10 / WP12) engines. Built to O.E. (Original Equipment) Specifications, this rotor is engineered to sustain the high-voltage and high-amperage demands of heavy-duty long-haul trucks and construction tippers.