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The Mishimoto Racing thermostat for Nissan RB engines opens at 155°F (68°C) to allow coolant to flow earlier than standard valves, a behavior intended to lower high engine temperatures common in modified or turbocharged setups. It promotes greater cooling efficiency and helps manage elevated temperatures by circulating coolant sooner during warm-up and heavy use. The unit is backed by Mishimoto's stated lifetime warranty.
Mishimoto Nissan RB 155 Deg F/68 Deg C Racing Thermostat
