One of the guys installed one on his z 1000, then did a dyno run.
Obviously, lots of variables in this. One specific bike, and one specific dyno.
The company , themselves, do not offer dyno charts. He ended up being disappointed with the power he showed that day. Torque was down, and the hp was not impressive.
It looks as if that company is way more into looks and low cost vs power increases. It does look cool, and the price is amazing, so maybe its a who cares sort of thing?
Still, when they take that same can and hang it under a fz07, fz09, z1000, gsxs, etc you probably wont see awesome results.
Again, hard to complain when the price is so good.