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Old 06-01-2006, 12:22 PM   #1
JoshP
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Default Which head gasket will be most reliable for 2.5 / 2.2 hybrid?

The thick gasket, the thin gasket or something else? Anyone? Going with stock 2.2 dual port heads, with the delta cams. Everything else is going to be stock. Phase II 2.5 block. thanks
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Last edited by JoshP; 06-01-2006 at 12:43 PM.
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Old 06-01-2006, 01:40 PM   #2
Matt Monson
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We just used the stock gasket for the phase I we did. They are all reputed to have been redesigned, but on my recent work I went with the STi gaskets. They are the same thickness as the NA phase II gaskets and a mulit-layer all metal gasket...
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Old 06-01-2006, 08:07 PM   #3
shipjumper
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is there much gain from the dual port over the single port? We have some duals hanging around... but I was just thinking of doing a fast swap for the phase I block..

whats the CR difference from Phase I to Phase II with the 2.2l heads???
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Old 06-01-2006, 10:27 PM   #4
JoshP
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actually, I do believe the single port heads would make more power on a 2.5 block personally. Bigger valves at least. Im using dual ports becuase they are easier to get my hands on, and im retaining stock exhaust. Compression comes out to about 12.5:1 with the thin gasket and 10.5? or maybe 11:1 with the thick gasket. With a phase 1 block you have to use the thick gasket though. I think thick is phase 1 and thin is phase 2 for the gaskets.
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Old 06-01-2006, 10:33 PM   #5
reddevil
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Not saying they are better, but I have found both aftermarket "OEM" metal gaskets and Subaru OEM metal gaskets. I have also seen ALOT of composite material gaskets. I would take the aftermarket metal gasket first, the subaru metal gasket second, and the rest last......

But I offer no proof.
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Old 06-01-2006, 11:22 PM   #6
JoshP
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cometic sells 2.5 gaskets but it only lists for Legacy 2.5 no year, considering that could be either Phase I or II
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Old 06-02-2006, 10:57 AM   #7
Matt Monson
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Just call Cometic. Before my headwork I ran their gaskets on my car. They cost about the same as the STi ones I am using now. But they do offer a couple of thicknesses and you just need to talk to them on the phone about it or e-mail them...
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Old 06-02-2006, 12:20 PM   #8
JoshP
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In their catalog it listed them at $45 a piece. Is that what STi gaskets go for? Becuase thats about the same price as n/a gaskets from the dealership.
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Old 06-02-2006, 03:27 PM   #9
Matt Monson
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I am showing dealer list price on the STi gaskets at $40...
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