Accel 4363 High Flow 160° Thermostat for 48-95 Jeep CJ Vehicles & Wrangler YJ with 6cyl. Engine

These high performance thermostats are designed to resist large variations in coolant pressure that occur at high rpm's where coolant temperature and coolant pressure fight for control of the thermostat keeping it from opening at its designated temperature. The balanced HP thermostat features all brass and copper construction, and open at the right temperature regardless of engine RPM.