301366, 56101 Z5011, 57366602, 660161MT, 66602, 83161, AMS660161, G60164, G63610, HD1213-0708, HD12130708, KG5463, MC826268, MG60164, MON66602, SA66602. Magnum Shock Absorber. Designed to handle the demands of high mileage and severe use vehicles, replace worn-out units with Magnum(R) shocks to help reduce excessive vibration.