Here we go...
US spec STI pistons are made of stonger material than forged according to Subaru. Is this PR stuff or fact?
"This latest STi piston is a departure from previous years in that it is a cast aluminum design. However, we believe this to be a special hypereutectic material and STi claims a 120% increase in strength over their previous forged pistons. "
-Posted by StrangerQ from previous discussion on US spec STI pistons. See http://forums.nasioc.com/forums/show...ghlight=piston
Your input is appreciated.