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

What kind of gaskets for ported heads?

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Old Oct 6, 2003 | 09:51 AM
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Default What kind of gaskets for ported heads?

Im curious as to what kind of gaskets you guys use for
ported heads and intake? All I see is stock sized Felpro
gaskets Won't the gaskets interfere with the flow of the
heads and ported intake?
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Old Oct 6, 2003 | 11:19 AM
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Default Re: What kind of gaskets for ported heads?

Head gaskets aren't a concern. The main thing to watch is when using LT4 parts. You must get the correct intake gasket. The LT4 race gasket PN is 12367777.
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Old Oct 6, 2003 | 11:47 AM
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Default Re: What kind of gaskets for ported heads?

Im looking for header and intake gaskets.
The heads and intake ports are bigger than
the gasket openings
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Old Oct 6, 2003 | 01:04 PM
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Default Re: What kind of gaskets for ported heads?

For headers, I always used to use 1406 Fel-Pros. They were slightly larger than a stock exhaust port. When doing the exhaust, I'd have the port matched to the gasket opening.

For intake, I always used the GM/Fel-Pro gasket. If you're using these and still getting interference, it sounds like the port has been enlarged too much. I guess you haven't hit a coolant passage yet?

FWIW, I now use Earl's Pressure Master gaskets. They've got removable inserts which came in very handy when I switch from stock heads (d-port) to my larger AFRs(square port).
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Old Oct 6, 2003 | 01:15 PM
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Default Re: What kind of gaskets for ported heads?

Thanks for the info
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Old Oct 6, 2003 | 04:38 PM
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Default Re: What kind of gaskets for ported heads?

I've always used Fel-pro gaskets on my car... I've been happy with them.
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Old Oct 7, 2003 | 08:01 AM
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Default Re: What kind of gaskets for ported heads?

Just wondering if I could trim the header gasket
or is that a stupid idea. Will that cause header
leaks? I just don't understand why there no
larger sized gaskets made. No problem finding
them for mustangs lol
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Old Oct 8, 2003 | 12:26 PM
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Default Re: What kind of gaskets for ported heads?

The Fel-Pro 1406s are larger than the stock ports. The only thing they wouldn't fit were my AFR race heads(210+) I "guess" you could trim them since they're not sealed on the end or anything. The Earl's fit almost perfect on the square ports of my 210s.
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