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Old 07-14-2013, 08:23 PM   #1
mitsuevo10
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Default ej25 sti hybrid with ej20 heads. help.

Im gonna build a 2.5 sti short block with ej20 heads and need to know what type of head gasket should i use and the thickness of it to match the sti compression. Thanks a lot.
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Old 07-14-2013, 10:32 PM   #2
BONFIRE074
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get a headgasket for the 2.5 sti
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Old 07-14-2013, 10:41 PM   #3
mitsuevo10
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Yeah but the stock sti headgasket is too thin and will be a bumpin the compression
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Old 07-15-2013, 12:11 AM   #4
mitsuevo10
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Any help pliss
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Old 07-15-2013, 12:24 AM   #5
mod maniac
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You need to get the combustion chambers done on the heads or get the right pistons. Those are the best ways to build a hybrid.
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Old 07-15-2013, 07:40 PM   #6
mitsuevo10
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What is the thickness of the stock sti head gasket
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Old 07-16-2013, 01:52 PM   #7
naCAnItihS
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Use OEM STI head gaskets and have the CC machined to the proper size. Having the head work done is not terribly expensive and is the best way to go.
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Old 07-16-2013, 02:10 PM   #8
RexWagonWA
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Default Help

Yes, rebuild it right and only rebuild once. Maxwell (WA), EQ Tuning (CA), NF (MN), and ASF all modify heads toi fit the 2.5 ltr block. EQ Tuning and Maxwell did mine and I am very happy with the results.
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Old 07-17-2013, 10:19 AM   #9
ChronoX720
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I used stock STi Headgaskets, as well as decked my 2.0 heads.
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