Here is the complete kit for L24 thermostat housing area, that consists of lower thermostat housing, top cover, thermostat, water temperature sender & nut, gaskets and bolts. These are the correct Japanese bolts, not one of those American knock-off bolts that have wrong markings on top. Don’t use those 13mm bolts! The Nissan/Datsun always use 12mm!
* This kit is designed for L24. It will work for L28 as well, but will not work for the factory Fuel Injection setup. The L28 thermostat kit is not available new anymore.