C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

L98 Header Gaskets

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Old Oct 16, 2008 | 02:06 PM
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Default L98 Header Gaskets

I just ordered some headers from TPiS for my '90 and I was wondering what type of gasket I should use on the stock head? Round port or square?
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Old Oct 16, 2008 | 04:51 PM
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Anyone?
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Old Oct 16, 2008 | 09:24 PM
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I'm pretty sure I'm running 1205's on mine

Felpro
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Old Oct 16, 2008 | 10:13 PM
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I know Fel-pro makes a 1205 intake gasket, is that the same number for the exhaust gasket? That doesnt seem to make sense...
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Old Oct 16, 2008 | 10:28 PM
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Oh hell, I think you're right.

I but swear I remember seein' 1205 on my exhaust gaskets as well.
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Old Oct 16, 2008 | 10:31 PM
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How 'bout 1405
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Old Oct 17, 2008 | 12:23 AM
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Here's what I'm using. Little pricy, but they're reusable and they seal.
I know they're listed for the LT1, but a '90 has '113 heads that have essentially the same raised D-port as the LT1.

http://store.summitracing.com/partde...5&autoview=sku
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Old Oct 17, 2008 | 12:46 AM
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I'm using earl's, tighten once seals great.
http://store.summitracing.com/egnsea...=KeywordSearch
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Old Oct 17, 2008 | 07:46 AM
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Thanks!
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Old Oct 17, 2008 | 10:11 AM
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I used Percy's Aluminum sandwich type gaskets for the SLP headers on my L98 Formula. Worked fine for many miles. I also used Stage 8 locking bolts.
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Old Oct 17, 2008 | 12:38 PM
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I'm also using Earl's Pressure Master Header Seals like Mick posted. I've have had them for a few years with no issues.

Sorry, I don't recall the exact part number or port size and shape that I used.

The aluminum retainer may have needed some grinding to clear the #8 plug (113 heads). I remember the installer bitching about this.

Last edited by tequilaboy; Oct 17, 2008 at 12:41 PM.
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