Used factory 1.6 liter engine coolant water thermostat neck for Early NA Mazda Miata. This is the aluminum pipe that attaches to the front of the cylinder head. The thermostat goes into the other end of this pipe and then thermostat housing attaches to it. Hardware, thermostat, gaskets, and housing not included. Part number B61P-15-170B. Fits 1990-1993.
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