I would assume, possibly wrongly (?), that Sube OEM wires are made in Japan by either NGK or Denso, both manufacturers of quality products and suppliers to Japanese car makers.
And if boxed sets prefixed SOA are , in fact,relabled aftermarkets, then they should, of course, conform to Subaru's standards, no?
So, OEM wires ARE actually aftermarkets since Subaru likely does not manufacture their own ignition parts (nor many other parts used on Subes), right?