Originally Posted by CDR RA

The main deal with the 02 STI motors I was aware of for strength is the semi closed deck, forged pistons and revised conrod design. (better big end connection) I have been lead to believe that all the STI motors in the aus spec 2.0 litre STI's ie. 02-05, had the same bottom end. The hypercrappies have only just been introduced in the 2.5.