Compatible with or fits: 1998 - 2005 GS300 3.0L 6-Cylinder. Direct fit replacement Heater cores transfer heat from the engine's cooling system to the inside of the vehicle. Thermostat housing and water outlets are connections that transfer coolant between the radiator and the engine block and generally house the thermostat. Designed to meet/exceed OE fit, form and function Constructed with quality, durable materials Durability tested on every new design. Heater Core. Review Description to Ensure Proper Fit.
