Simon bright Posted February 13, 2016 Share Posted February 13, 2016 I have a 2005 forester 2.5l turbo EJ25 engine and just found out it has STI block. I have replaced crank with EJ25 crank. Will it be the same as STI crank ? Quote Link to comment Share on other sites More sharing options...
kershaw-330s Posted February 14, 2016 Share Posted February 14, 2016 Probably not and your block probably isn't the same as an sti either , the ej257 or 255 in sti trim run a semi closed deck block but I don't think the foresters do . But I maybe wrong Sent from my iphone using Tapatalk Quote Link to comment Share on other sites More sharing options...
Simon bright Posted February 14, 2016 Author Share Posted February 14, 2016 It is semi open deck block. That makes it EJ257 sti block right? Quote Link to comment Share on other sites More sharing options...
savage bulldogs Posted February 14, 2016 Share Posted February 14, 2016 As far as I'm aware the 2.5 ltr crank is the same across the range . As I think there's only 1 type of nitraded crank listed when you use them in a 2ltr block (to make a 2.1 stroker). You could give the part numbers a cross check on import car parts website to be certain . in classic 2ltrs it's not the block type that distinguishes it's a sti (they change over the years /versions). It's the cams ,forged pistons /rods and headgaskets that are uprated but this could be different for the 2.5 as I'm not up to spec on newage If it's not broke .....upgrade it 😊 Quote Link to comment Share on other sites More sharing options...
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