3.5 LITER. Drain plug. A plug which allows the fluid from the Hybrid Inverter Radiator to drain. Part included in radiator assembly. Radiator Drain Plug. RADIA. valve. AUXILIARY. Drive Motor. Included with: Auxiliary radiator, Engine radiator assembly, Inverter cooler, Inverter radiator assembly, Radiator, Radiator assembly, Radiator assy.