This could be the box for the Veloster Turbo II (2018-up). There isn't much risk in trying, the plugs are all the same and it's lowest settings are 2-3 psi over stock.I called them as well. They said the same thing. Im in FLA.
DTE, GAN, RaceChip all pretty much the same. The GAN was on sale ($547 US shipped) with bluetooth. I would have gotten one of these already but I am testing fuel. If you can gain power with better fuel and thus far that is a yes, then power will be higher once plug-in one of these boxes.
I don't think 50+whp out of ones these things is far-fetched at all.