This is the collar that your release bearing presses onto, it rides on the snout of your transmission.
If yours shows wear (under the throw out fork ears, or on the inside bore that slides on the trans), or you snapped one of the ears off when you removed/installed the throw out bearing, you need one.
available without bearing or we can press a new, Japanese made release bearing on there for you. Also, if you are purchasing a clutch kit and this hub, we can press the bearing from your kit onto it on for you too.
fits 1981-1988 ONLY 22R / 22RE / 22RTE (89-95 release bearing / throw out bearing is a 1 piece unit, you DON'T need this, move along)