The MotoRad SOHC Thermostate Housing is an aftermarket replacement piece for the existing thermostate housing. The new SOHC Thermostate Housing contains brass rings, and is an excellent replacement when adding a thermostate. Usually when replacing the existing thermostate, the existing thermostate housing tends to break. So save the time and the worry and change to this SOHC Thermostate Housing made by MotoRad before you have to.