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23 July 2007, 09:51 PM

mufcdamo

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ej25

is the ej25 out of a legacy non turbo the same as the ones from the one from later sti's.ie can you use it on a turbo'ed engine or will pistons need changing thanks

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23 July 2007, 09:56 PM

[Davey]

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C/R will be to high on a N/A engine.

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24 July 2007, 09:41 PM

merlin24

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Agree with [Davey]:
The Compression height and volume of the N/A Pistons and Turbo ones are different.
The N/A pistons still well above the block face and use thick steel head gaskets.