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Mishimoto's racing thermostat for the 2010–2016 Audi S4 begins opening 25.2°F (14°C) earlier than the stock thermostat at about 159.8°F (71°C), allowing coolant to flow sooner and helping the cooling system operate more efficiently. Supplied with an OEM-quality housing for correct fitment, this thermostat is intended as a direct-fit upgrade and is backed by Mishimoto's Lifetime Warranty.
Mishimoto 10-16 Audi S4 Racing Thermostat - 71C
