Mishimoto racing thermostat for the 2017+ Honda Civic Type R opens earlier than stock to help the cooling system start shedding heat sooner: it begins opening at 68°C and is fully open at 83°C, compared with stock timings. By allowing coolant to reach the radiator earlier, it helps the engine manage temperature under spirited driving and pairs well with Mishimoto radiators and direct-fit oil cooler kits for improved thermal control.
Mishimoto 2017+ Honda Civic Type-R Thermostat