I bought my '16 fj used with just 3300 miles on it. it came with lots of extras, including the black widow. I think the full carbon 250 (no docs, and it is snug under the right rearset), and no baffels. great sound. I had the ecu sent out and flashed. not sure just how it affected the power. however, I was speaking with a tech guy and he was pretty clear that having the ecu flashed without running it on a dyno still only gives you a generic map. if you really want to see a difference in performance you HAVE to do it with a dyno.
now I will have to see just when I can do that.