Performance Thermostat, 82C/179FMishimoto is proud to release a racing thermostat specifically designed for the 2003 2011 Jeep Wrangler TJ JK. Whether you are cruising down the highway or climbing over boulders, an effective cooling system is extremely critical. Mishimoto racing thermostats promote greater cooling efficiency by significantly decreasing high engine temperatures. Once the engine is fully warmed up, the Mishimoto low temperature racing thermostat will open at a lower