L98 Header Gaskets
Oct 16, 2008 | 02:06 PM
Thread Starter
Le Mans Master
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From: Akron Ohio
2025 Corvette of the Year Finalist - Modified
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St. Jude Donor '09-'10-'11
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?
Oct 16, 2008 | 04:51 PM
Thread Starter
Le Mans Master
Joined: Oct 2007
Posts: 9,700
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From: Akron Ohio
2025 Corvette of the Year Finalist - Modified
2024 C5 of the Year Winner - Modified
2023 C5 of the Year Finalist - Modified
2022 C5 of the Year Finalist - Modified
St. Jude Donor '09-'10-'11
Oct 16, 2008 | 09:24 PM
Safety Car
Joined: Oct 2001
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From: Connectivette
I'm pretty sure I'm running 1205's on mine
Felpro
Oct 16, 2008 | 10:13 PM
Thread Starter
Le Mans Master
Joined: Oct 2007
Posts: 9,700
Likes: 3,469
From: Akron Ohio
2025 Corvette of the Year Finalist - Modified
2024 C5 of the Year Winner - Modified
2023 C5 of the Year Finalist - Modified
2022 C5 of the Year Finalist - Modified
St. Jude Donor '09-'10-'11
I know Fel-pro makes a 1205 intake gasket, is that the same number for the exhaust gasket? That doesnt seem to make sense...
Oct 16, 2008 | 10:28 PM
Safety Car
Joined: Oct 2001
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From: Connectivette
Oh hell, I think you're right.
I but swear I remember seein' 1205 on my exhaust gaskets as well.
Oct 16, 2008 | 10:31 PM
Safety Car
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From: Connectivette
Oct 17, 2008 | 12:23 AM
Drifting
Joined: Dec 2005
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From: High Ridge Missouri
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
Oct 17, 2008 | 12:46 AM
Le Mans Master
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Oct 17, 2008 | 07:46 AM
Thread Starter
Le Mans Master
Joined: Oct 2007
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From: Akron Ohio
2025 Corvette of the Year Finalist - Modified
2024 C5 of the Year Winner - Modified
2023 C5 of the Year Finalist - Modified
2022 C5 of the Year Finalist - Modified
St. Jude Donor '09-'10-'11
Oct 17, 2008 | 10:11 AM
Le Mans Master
Joined: Feb 2003
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From: Chicago IL
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.
Oct 17, 2008 | 12:38 PM
Melting Slicks
Joined: Aug 2003
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From: Lakeville MI
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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