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Difference between these GM MLS head gaskets??

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Old Sep 23, 2011 | 07:42 PM
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Default Difference between these GM MLS head gaskets??

I have found these 2 part numbers.....12589226......12498544
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Old Sep 24, 2011 | 12:49 AM
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Originally Posted by adham
I have found these 2 part numbers.....12589226......12498544
Just looked it up real quick and it looks like the 2nd one come with both gaskets vs just one. I couldnt find any info on the thickness on the 2nd one but the first was .051.
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Old Sep 24, 2011 | 01:01 AM
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Did some more research and it looks like the first one is three pieces of steel sandwiched together where as the 2nd one is some black fiber stuff, from what I saw it is much better to get the steel one as it holds up much better and doesnt stick to the heads.
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Old Sep 24, 2011 | 06:47 AM
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supposedly the MLS is more forgiving for imperfect surfaces better than the graphite. is that correct?
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