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Old 01-18-2010, 05:53 PM   #1
hobbesnapoli
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Join Date: Aug 2009
Location: PA
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02 WRX vf39

Default Hybrid Gasket Set

Did some searching- seems like if you're building a Hybrid you definitely want the 10105AA590 / EJ257 gasket set. Putting EJ205 heads on an EJ257- will I need any other gaskets? - Basically I have an EJ257 SB and all small parts / heads / intake / etc. are EJ205 parts.

Only thing that jumps out from my reading is the oil cooler gaskets- which may be different.

Thanks
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Old 01-18-2010, 06:32 PM   #2
vanillajuice
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Java Black Pearl

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sti head gasket ftw!
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Old 01-18-2010, 09:04 PM   #3
ownnij
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2002 AW Bugeye ej257
6spd, GT3076R, Alky & EWG

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you want the ej205 complete gasket set then STI 2.5 head gaskets. the only thing i noticed i didnt get with my complete gasket set is the rubber gasket for the breather thing on each head. shrugs.
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Old 01-18-2010, 09:48 PM   #4
MrSlowbaru
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if you are building a hybrid motor and want to use an oem headgasket, i would suggest the 98-99 legacy outback, 2.5 twin cam N/A head gasket. it is much thicker than the oem sti headgasket and will bring your CR down a little.
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Old 01-18-2010, 10:52 PM   #5
hobbesnapoli
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Quote:
Originally Posted by ownnij View Post
you want the ej205 complete gasket set then STI 2.5 head gaskets. the only thing i noticed i didnt get with my complete gasket set is the rubber gasket for the breather thing on each head. shrugs.
So the EJ205 gasket set has different top end gaskets than then EJ257 gasket kit? Those are the only ones I can't compare (no sti top end) -although I'm assuming it's all basically the same...? since most of the block gaskets are

(I know I need STI head gaskets)
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Old 01-18-2010, 11:18 PM   #6
ownnij
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6spd, GT3076R, Alky & EWG

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yeah your going to need the gasket set for the ej205 because i believe some of the gaskets on the head are different between the ej205 and ej257. i forgot what it was but it worked out fine for me but like i said. it didnt come with the gasket for that breather thing on each side of the heads.
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Old 01-19-2010, 07:11 AM   #7
AWDWRXLOVER
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i used the 257 gakset kit. doesnt really matter. if you buy 257 you need vc and cam gaskets. or you can but the 205 set and buy headgasket seperate. either way, you end up buy a couple extra gaskets. also, you dont NEED to use STi hg, many use cometic and they work just fine too.
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Old 01-19-2010, 01:46 PM   #8
hobbesnapoli
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Yea i'll just buy the 205 kit and then pick HGs based off which pistons I end up with / compression I want

Thanks for the help guys
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Old 01-19-2010, 02:07 PM   #9
vanillajuice
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higher compresson ftw!
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Old 02-25-2010, 08:56 AM   #10
jsnm
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I know im bringing this back up,but id rather,than add a new thread.
If im running an ej257 block,and 05 sti heads,should i should just go with the 05 sti gasket set?
I just want to make sure im going to get everything i need in there.
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Old 02-25-2010, 09:08 AM   #11
ownnij
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Yes of course but what other gasket set would you consider? this thread is about gasket sets for hybrid motors. if you have a oem assembled motor then you'll use the gasket set that corresponds with your motor. like ej205/ej205 gaskets, ej257/ej257 gaskets, ej255/ej255 gaskets. if you give the dealer your vin number they can pull your parts easy.
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Old 02-25-2010, 02:07 PM   #12
Concillian
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Quote:
Originally Posted by jsnm View Post
I know im bringing this back up,but id rather,than add a new thread.
If im running an ej257 block,and 05 sti heads,should i should just go with the 05 sti gasket set?
I just want to make sure im going to get everything i need in there.
Well, there are like half a dozen different ways to do the intake cam gears and pickup sensors if you're swapping in the heads too.

You'll get the 257 gasket set, but if you're using one of the permutations that uses the ej205 cam gears, you need to pick up an extra set of the smaller ID cam seals. These are the same size as 05 exhaust cam seals or any year ej205 intake or exhaust seal.

If you're using a permutation with the ej257 AVCS cam gear, then what's in the ej257 set will obviously fit great.
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Old 02-25-2010, 04:07 PM   #13
jsnm
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CTS-V,& 05 RS

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well ill be using aftermarket camshafts,and matching sti cam gears with the heads.
thanks for all the help though
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