'Drop in' style engine cooling system thermostat to fit most 105 Series cars from 1968-83, all Montreals and some Alfetta 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. It should have the top radiator hose connecting to a domed cover at the front of the inlet manifold.