Recently a friend asked me if this suspension which he found for sale in Japan could be the real deal? But let’s start at the beginning.  Those who know my Suspension knowledge post (i have a bigger update on that planned soon), might know that Nissan / Datsun sold a set of adjustable “Competition” / “racing” / “Sports option” suspension kit: I don’t think they ever sold many of those and so they are extremely rare to see these days. so when the set from the first picture showed up, we had to investigate. The sales ad says it’s for the S30Z but the seller is not even sure. He…