LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Cometic head gaskets

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Old Jul 11, 2007 | 11:18 PM
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Default Cometic head gaskets

IS anyone running the 4.040 bore cometic heads gaskets on there 355. I am thinking about running it but do not want to have any problems since most head gaskets i see usually have a bigger bore. My compression will be about 11.6:1 with these.

http://www.cometic.com/da_viewimage.aspx?da=9
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Old Jul 11, 2007 | 11:19 PM
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anyone running the 4.040 bore cometic heads gaskets on there 355
Wouldn't that be a 357????? I don't see a reason why you couldn't.... They make a .040 cometic gasket i'm sure..... it's all about choice. high hp and or power adders and you should be using a good gasket ie cometic....
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Old Jul 11, 2007 | 11:45 PM
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lol sry its late my typing sucks. I meant to say i am running a 355 and want to use the cometic head gaskets with a 4.040 bore. usually head gaskets have bigger bores like the felpros with a 4.125 i just didn't want to run into any problems. but it looks like i wont so thats for the advice.
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Old Jul 12, 2007 | 12:27 AM
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I can't see any problem either since your bore is .030. But if 'normal' size is 4.125, why not just run a 4.050 then?
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Old Jul 12, 2007 | 01:37 AM
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I'm running 4.01" .027" cometics on my stock bottom end.
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Old Jul 12, 2007 | 09:24 AM
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I just got mine running with Cometic 4.040 gasket but .030 thick and mine is a 355" everything seems fine to me.
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Old Jul 12, 2007 | 09:57 AM
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Ray@Nitrous Outlet
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I ran the 4.040 / .040
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