Quote:
Originally Posted by blu_
Even though this quote is very old. All of the USDM STI's comes with forged rods and and a forged crank.
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That is correct. The pistons are most likely hyperutectic type, which stronger than normal cast aluminum and expands much less. This is good for emissions, and plenty strong enough for NA engines. This is the same type of pistons used on the STI/WRX.
Realistically, pistons are not going to be a problem until we add boost. Even with 1000RPM more redline, I bet these will do just fine.