Used engine cooing system thermostat housing. To fit most 105 Series cars from 1968-83 plus some 116 models. As the intake manifolds are interchangeable, these are often found on earlier cars as well, so please check that your car has the relevant style of inlet manifold to suit this thermostat housing. Note, these are not the housings that have a built-in thermostat.
These housings are fully functional but will need cleaning up.