Description

WBK20 Mercruiser thermostat housing kit for GM small block. Mercury Part Number: 87290A23 New complete thermostat housing with bronze 'T', gaskets, top plate, bracket, bolts and plastic ball valves. Fits many Mercruiser V8 engines, compare to your old one or check the part number before ordering. This fits small block v8 engines only, the bolt pattern is different for big block engines