What application would you be using this on? I have only heard bad things about it myself. You're trying to make an open diff a locking diff and it is not set up to take the heat that is caused from high performance driving. I have heard of some exploding diffs from the "conversion" units. Again, this is not first hand accounts, only what I have seen/heard. I would save up to get a real lsd instead. In my Si I have a JDM Type R lsd and I have really enjoyed it, it doesn't have as much lock up as quick as the quaife/spoon/kaaz/mugen diffs but still a really good diff for the money it cost me.(330 with shipping from Japan and 100 for a type r ring gear and pinion to make it work in my tranny) Good luck and provide a few more specifics about what you are wanting to do and what you are wanting to do it in, I may be able to be more helpful if I know the specifics.