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Head gasket bore specs???

Generation III Internal Engine 1997-2006 LS1 | LS6

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Head gasket bore specs???

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Oct 14, 2004 | 07:04 AM

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Head gasket bore specs???

I have some Felpro head gaskets that are marked 4.135 bore that came with my 5.3 heads.
Are they suitable for a stock bore application or not?
I can't compare them with the originals yet as I haven't started the swap.
Thanks, Tom.

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Oct 14, 2004 | 07:20 AM

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I just did a head swap and used Cometic .040" x 3.910" gaskets. Your's sound like they are for a big bore motor. I would be concerned about the seal points around the sleeves.

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Oct 14, 2004 | 09:02 AM

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That's what I thought

.
I don't really know why 4.135 bore gaskets would come with 5.3 heads.
Just wondered whether I was missing something.

And as I'm in the UK it's not a simple exchange matter!!!!

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Oct 14, 2004 | 04:33 PM

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You could get the gm mls gasket for around $40 for the pair and return the cometics. My friend is running them with a lot of power and no leaks.

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