It is a billet aluminum basket with the heavy duty welded backing plate and springs:


It uses the stock inner sleeve hub and pressure disk (where you install the steel plates and fiber plates), but the plates and fibers that came with it are a bit smaller in diameter than the stock ones. The stock plates/fibers won't fit inside the basket. And also, the steel plates that came with it don't have any dimples in them. Is that normal?
Stock stuff is on the left:


I'd like to try and figure out what I have here, so that I can order replacement fibers and/or steel plates if I need to. The ones that came with the clutch seem fine. In fact, the plates and fibers are a bit thicker than the stock ones.
Any ideas?
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