until you need them. The dreaded heater core blew today. First noticed coolant smell and steam coming from the windshield defrost vents and from under dash. Turned on the heater and it alleviated the situation somewhat. Checked underneath car and saw coolant drips right under heater core area. Bought the Behr heater core a few years ago along with the black plastic twin hose assembly and the necessary o-rings waiting for the eventual failure to occur. Will tackle the job in the coming days and it’s just great not having to buy and waiting a few weeks (or more) for he parts to arrived.