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Mishimoto low-temperature racing thermostat and housing for 2003–2024 Toyota 4Runner 4.0L is a direct-fit replacement that opens at a lower temperature (71°C/160°F versus the factory 82°C/180°F). The earlier opening allows coolant flow sooner to reduce and maintain lower engine temperatures, useful in hot climates, higher-power setups or extreme towing. The kit uses a stock-style housing for a proper seal and straightforward installation.
Mishimoto 2003+ Toyota 4Runner 4.0L Low-Temperature Racing Thermostat
