are the 2.2 and 2.4 exhaust manifolds identical? i am looking to get headers to hook up to the magnaflow cat back but can only find 2.4. also i know cobalt/ion/g5 have the same engine but do they have different manifolds due to spacing or some other reason? can they be interchangeable? thanks

 

Yes

 

and 2.0 (lsj)

 

Each of the exhaust manifolds has a different part number.The turbo engine exhaust manifold has a differrent outlet flange to accomodate the turbocharger mounting.

 

[QUOTE=ZTony8;377618]Each of the exhaust manifolds has a different part number./QUOTE]



Check again part # 12581284 covers all these years and models go to www.gm-auto-parts.com put in the #

It is the same as the one that came off my 07 2.2 in 07 they removed the part # on the casting.The header comes in a box with the part # on the box GM is just messing with your head.

It`s just GM running the different parts game they removed the part # so you think there is a difference.2.0 2.2 and 2.4 is the same thing this thing has been beaten to death allready.Don`t wast your time unless you are going to polish and port your factory header.


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1st design

»Manifold
Chevrolet › Hhr › 2008
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»Manifold
Chevrolet › Cobalt › 2008
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Exhaust manifold
HHR, 2.4L
»Exhaust manifold
Chevrolet › Hhr › 2006-2007
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Exhaust manifold
Cobalt, 2.0L
»Exhaust manifold
Chevrolet › Cobalt › 2005-2008
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Exhaust manifold
Cobalt, 2.4L
»Exhaust manifold
Chevrolet › Cobalt › 2006-2008
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Chevrolet › Cobalt › 2005-2007
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What amount HP is gained with the header you are wanting buy? The output of money may not be worth it for the possible slight gain in HP just my thought.

 

a header alone will usually net you a little gain that you may not notice. but say you add exhaust and a DP to that the header will do its work quite nicely.

 

got ahead of myself . same question 2009 2.2 LS P/N 12581284 will it fit . does it come with any of the gaskets ????????????

 

hi im looking for a down pipe and header for a 08 2.2l hhr now i live in ny and they have changed the emission laws here any cat or downpipe i find says not for sale in ny i have a gibson cat back and i wanna finish the exhaust

 

will the Cobalt down pipe attach to our stock exshuast?