99430 2-SpeedElectric Fan Controller, Adjustable with Relay
2-Speed Electric Fan Switch/Controller, Adjustable Thermostat with ?/? amp Relay. This is used for activating the 2-speed electric fan motor to come on at the temps you set. Comes with a sensor that installs into a 3/8" NPT water port in the manifold or cylinder head for accurate sensing.
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