I'd be interested to see if there was a way to design a T-harness that would allow this to intercept/copy the signals from the head unit, to add a subwoofer without the factory EQ and cutoffs applied, but maintain output volume control (which could probably be tweaked somehow) but still allow...
Why would it not be normal? That's far too consistent and uniform to be accidental. Those are stamped in to reinforce the metal. When it's flat it's flexible, but doing that adds strength.
It seems like someone is making these in their garage because he is. He's a single dude that thinks his sh*t don't stink and has been banned from so many groups just because of the lies he slings and the drama he brings. He's who runs the Type R Product Reviews pages too, if you run across...