Thanks for the pic, Mike.
Excellent info, Ron. I was pretty damned sure it was cast due to the texture, but even now, looking at the grid pattern on the side face inside there, you can't do that with a forging.
You still believe it to be hypereuctectic, eh Ron? I guess I could see it, especially if Subaru wanted to get rid of piston slap cases by just making the gap smaller (the HE pistons have a lower expansion rate, right?).