You must be talking about the dual bypass. Not exactly mass produced combined with Al's kept margin. The mount is machined out of a homogeneous plate, which a valve inside, etc.
You really aren't comparing apples to apples. The Perma cool is cast in China, pot metal piece from the same mold that produces thousands (millions?) for a whole bunch of other companies. It truly is a crappier piece. Besides, it's not a bypass filter.