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Old 03-20-2014, 08:23 PM   #1
beef
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Default Different Hybrid Gasket Question

I have a block out of a 2009 wrx (EJ255 703 Casting) that i am putting 2002 S20 heads on. Heads have CC porting out to B25 specs so i dont need thicker gaskets. I have a couple of questions. First, what OEM STi head gasket do i use? I see funny dates like 04-06 and 06/06-06/07 for the gaskets when ordering. I know the reason is water passage changes. I dont see any specific gaskets for models after 2007. Does it matter? Next question is, what is the easiest and/or cheapest way to orders all gaskets? Do i buy a master set for a sti? Wrx? Buy individual? Any info will be appreciated. Thanks
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Old 03-20-2014, 09:51 PM   #2
Strider327
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I would purchase a master gasket kit from Flatiron's Tuning and ask them specifically which STI head gaskets you should use.
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Old 03-20-2014, 10:46 PM   #3
300zxturboftw
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You will need valve covers and cam seals for the s20 heads. the rest will be used through STI gasket kit.
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Old 03-21-2014, 09:01 AM   #4
03SubyWRX
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I actually bought each individual seal from my friend who works at a Subaru dealership so I could only get the parts I really needed. I still have this list somewhere if you want the part numbers if you want to go this route.

Otherwise, what 300zxturboftw said is pretty much standard fare for hybrid builds.
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Old 03-21-2014, 02:10 PM   #5
beef
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Thanks Guys. I will probably get the set and deal with leftovers.
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Old 03-24-2014, 12:30 PM   #6
gfx2043
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I got ones for a 04 sti when I built mine with a 09+ block and EQ CNC heads and I have no problems.
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Old 03-24-2014, 01:53 PM   #7
FlatironsTuning.com
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Quote:
Originally Posted by beef View Post
I have a block out of a 2009 wrx (EJ255 703 Casting) that i am putting 2002 S20 heads on. Heads have CC porting out to B25 specs so i dont need thicker gaskets. I have a couple of questions. First, what OEM STi head gasket do i use? I see funny dates like 04-06 and 06/06-06/07 for the gaskets when ordering. I know the reason is water passage changes. I dont see any specific gaskets for models after 2007. Does it matter? Next question is, what is the easiest and/or cheapest way to orders all gaskets? Do i buy a master set for a sti? Wrx? Buy individual? Any info will be appreciated. Thanks
First, the head gaskets are determined by the heads and not the block. All of the block castings are the same up through 2014 (part # wise) it is the heads that have changed. There is not specific Subaru gasket for what you are looking to do, but we would recommend the 2004 - 2006 STI head gasket, as that seems to mate up with the S20 heads best.

As far as getting everything in the easiest and most cost effective way, that would be the Master Gasket Kit. You would need the kit for a 2.0 WRX ( I'd recommend the later one regardless of your year), but the head gaskets will be different as mentioned above, so those you would need to add separately.

The nice thing about the Master Gasket Set is that they are pretty darn comprehensive, so you will have all the gaskets that you need and that can help to make the build process go smoother. Often we find that if you start putting a kit together individually it will get at or more than the MGK pretty quickly.

Good luck with your build.
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Old 03-24-2014, 03:30 PM   #8
beef
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Thanks Flatirons! Exactly the info i was looking for.
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Old 03-24-2014, 05:17 PM   #9
03SubyWRX
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Quote:
Originally Posted by FlatironsTuning.com View Post

First, the head gaskets are determined by the heads and not the block. All of the block castings are the same up through 2014 (part # wise) it is the heads that have changed. There is not specific Subaru gasket for what you are looking to do, but we would recommend the 2004 - 2006 STI head gasket, as that seems to mate up with the S20 heads best.

As far as getting everything in the easiest and most cost effective way, that would be the Master Gasket Kit. You would need the kit for a 2.0 WRX ( I'd recommend the later one regardless of your year), but the head gaskets will be different as mentioned above, so those you would need to add separately.

The nice thing about the Master Gasket Set is that they are pretty darn comprehensive, so you will have all the gaskets that you need and that can help to make the build process go smoother. Often we find that if you start putting a kit together individually it will get at or more than the MGK pretty quickly.

Good luck with your build.
I agree. It was cheaper for me to piece it together because I had a source that gave me parts for cost.
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