Description Aussiespeed cast aluminium top thermo housing to suit Holden 6 cylinder red, black and blue motors. These are a sand cast housing not a diecast housing. It is recommended that a corrosion inhibitor be used in the cooling system. These are a hand molded casting not a mass produced machine made thermostat housing. They are CNC machined and supplied as a top housing only no bolts or gaskets included. These can be used to replace WO7 Kilkenny Castings part number . Aussiespeed offer both top and bottom housings and can be purchased as kit including gaskets and bolts in our online store. The casting is a premium quality and can be polished.
