Right you lot - pin your ears back
STi limited editions from 1994 quite often have Subaru brand forged pistons fitted. This may be where the " option " tag has come from, but it may also be that they originally had forged, but have had a rebuild at sometime/ somewhere and the wrong pistons were fitted then. It is a bit too far back in time to be definite about that.
Sti vers 2 RA has the Subaru produced forged pistons fitted as standard MOST Vers 2 RA have have Closed deck block [ let's not go there for the minute ]
Then all STI and STi RA up to Vers 7 [ Bug eye ] have Subaru Forged pistons as standard.
Blob eye & Hawkeye [ & EJ257 ] have hyperEutectic [ usually spelt bullsh*t ] pistons fitted - which are an extremely good product for a manufacturer to use - but totally crap for any sort of performance engine.
The Subaru forged type look similar to a cast piston in shape and design and do not at all look like the billet types that you get from: Cosworth, Omega, Mahle CP, Ross, Wiseco, Wossner, Jun [ cosworth] et al.
Cleared that up then ?
David APi
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