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except for d17 today at the junkyard I had to get myself one for my ef. Mine has a bleeder screw. For the most part I would say the first generation of these water outlets are the ones with bleeder screws. The second generation are the ones with the same casting style but the bleeder screw hole is not threaded and there is no bleeder. The third generation I assume are the other ones. The bolt holes line up the same for all of them. When you go to pay if you decided to. Just let them charge you for a thermostat housing. Water outlet will most likely not be an item in there system and they’ll have to make up a part and it will be probably more expensive.