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The Mishimoto racing thermostat for 1999–2005 Volkswagen GTI 1.8T is a direct-fit replacement that opens at a lower temperature (180°F) than stock, allowing coolant to circulate earlier and helping maintain cooler engine temps for street or track use. Built to improve cooling efficiency in stock or modified GTI setups, it provides a straightforward installation and is covered by Mishimoto’s Lifetime Warranty for long-term peace of mind.
Mishimoto 99-05 VW GTI 1.8T 180 Degree Racing Thermostat
