Due the fact that Iv been told the03 wrx did not come with forged pistons I wanted to get some for my motor. However Iv now been told that they did. I know the sti bugeye came with em but the US didn't get these. Also what size injectors do the Wrx have stock?
none of the US built Subarus have forged pistons. Also its not really the pistons you have to worry about as much as the rod bolts. They tend to break once you get around 400ish hp.