i might make me a bottom hose outlet as i dont like this one as it heads backwards to get behind the power steering pump then it turns sharp right now i dont have a ps pump i can come straight out and forwards towards the rad, the hose that disappears behind the exhaust manifold is the heater circuit and i dont see the need for a heater in a go kart lol, whats the other pipe that connects to the thermostat housing ? is that to allow any air to rise up to the rad or is that the water circuit when the thermostat is closed ?