True, but the snap ring isn't magic unobtainium just because Nissan doesn't list it anymore. With the caveat that I have not done this, my guess is that you could just order a 68mm nominal diameter internal snap ring from anywhere and it would just work. In the EU the replacement bearing kits for the S13 that Moog, Bendix, etc. sell seem to all come with a new ring. Dunno why US suppliers don't do that!
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