Buy 2003 Subaru STI Cover Thermostat. Engine Coolant Thermostat Housing A failed thermostat housing Engine, Coolant, Cooling - OEM Subaru Part # 11060AA420

COVER-THERMO Engine Coolant Thermostat Housing

Fits WRX

Engine Coolant Thermostat Housing
A failed thermostat housing will likely result in a cooling system leak, or will cause the engine in your 2003 Subaru STI to overheat. Consider replacing your engine coolant thermostat or having our staff of expert techs handle it for you.