thermostat and radiator.
gasket goes under the thermostat housing, its held on with two 10 mm bolts. you'll want to scrap both sides clean with a razor to clean it of any old gasket, then bolt the new gasket in after your done flushing it, then put the t stat back in, new gasket, and the housing back on top. the bleeder valve is on top of the t stat housing. its a screw in the top. you cant miss it.