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#16: 03-16-2013, 10:31 PM
DOHCEJ22E1's Avatar
Title: Monkey
Location: Brooklyn, CT.
Car: 1996 Subaru Legacy LSi.
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Originally Posted by mattmattyxcore View Post
So is it as simple as just swapping the heads and new gaskets? I'm trying to get to know this stuff and would love to do this! Most of my driving is highway and plenty of 25's at the junkyard.
To create a DOHC EJ22, you need the following:
25D heads (97-99).
25D oil pan & dipstick.
25D black coolant passage line for the driver side head.
25D intake manifold.
25D ECU.
EJ22 shortblock.
EJ22 head gaskets (MLS, thin-.050-, & for the 222).

Anywhere north of 2500-3000rpm will be a vault of eagerness & mpg.
Ordering a head gasket thin enough will get you VERY close to 10:1.