System Features Electric Fan Set-Point Temp Switch 190 Degree Switch. Specially bored out to allow proper coolant flow around thermostat.(On at 192 degree off at 182 degree)Switch is 3/8 NPT. Some applications may need adapter 34303-VUG 3/8" x 1/2" sold separately." Vehicle Fitment warning California Proposition 65 arrow_drop_down WARNING: California proposition 65