I saw a Z3 kit for sale once and the crossover looked like a stock crossover with a flange welded to it, not bent to feed into the turbo or anything, just a T. The Z7 kit appeared to be better in a lot of ways and the statama kit was too expensive. I'm guessing they are selectively exiting the 3800 market. They will probably keep the best selling stuff, but not make anymore of the less popular items.