Spoke with SOA this morning regarding the cast/forged debate. I asked the rep on the phone for clarification. After being on hold for about ten minutes while she checked, she responded that they were indeed forged aluminum. I told her that a well-known performance company disputes their claim. She stood by her statement, and said that she'd talked to a Subaru technician at her location, and had found it in an STi reference guide that she had access to. Either the pistons are forged, or every Subaru rep that I've been in contact with via phone and email has lied.