New Four Seasons thermostat housing with gasket and 160 degree thermostat HiGH FLOW to suit pre cross 250 Falcon motors. These thermostats apparently flow 50% more than a stock thermostat so probably worth the $5 extra for piece of mind. What is in the photo is what you will get, a new housing, gasket and the thermostat. I do have 180 degree thermostats if you prefer those.
note, water neck outlet is 1.5" please check against what you have as some people have the 1.25" outlet.
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