They are already available in Japan. I have seen photos of a few cars with them installed already.
The springs are all new and different, which will require all new springs and new setups. IMO, the cost isn't worth it for the small performance increase—which is even still debatable at this point, if there is one at all.
Personally, I'd like to know the weight difference between the 2 types of shock sets, but that's another discussion elsewhere on this forum.
