IAG 156 Degree Low Temperature "EJ" Thermostat for Subaru 02-14 WRX, 04-21 STI. Condition is New. Shipped with USPS Ground Advantage. For Subaru owners pushing their 2002-2014 WRX or 2004-2021 STI EJ series engine to the limit, the IAG 156 Degree Low Temperature EJ Thermostat is a smart upgrade. Unlike the factory thermostat, which doesn’t open until 172.4°F (78°C), this unit starts opening at 156°F (69°C), improving cooling efficiency by allowing coolant to circulate sooner.
