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

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Old Jul 2, 2011 | 05:57 PM
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Default Header Bolts

Anybody sell long header bolts? i.e. 1 1/4" +

Reason I ask is that my Hooker headers were not cleaned up before install, the the gut charged me to do this. So now I need to double gasket, till I can get one of my cars out of the garage to work on the vette.
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Old Jul 2, 2011 | 08:24 PM
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Summit Racing has them.http://www.summitracing.com/parts/MRG-6312/
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Old Jul 3, 2011 | 12:47 PM
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Forget double gaskets. Run Percy dead soft aluminum they're thick and soft and conform very well to imperfections. This way you don't have to take them off again later to redo.
I've run them and had great luck.

http://www.summitracing.com/parts/PHP-66031/
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Old Jul 3, 2011 | 03:03 PM
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Originally Posted by ultraviolet70
Forget double gaskets. Run Percy dead soft aluminum they're thick and soft and conform very well to imperfections. This way you don't have to take them off again later to redo.
I've run them and had great luck.

http://www.summitracing.com/parts/PHP-66031/
Those gaskets are the best...WW
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Old Jul 3, 2011 | 06:09 PM
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Originally Posted by surfer93
Anybody sell long header bolts? i.e. 1 1/4" +

Reason I ask is that my Hooker headers were not cleaned up before install, the the gut charged me to do this. So now I need to double gasket, till I can get one of my cars out of the garage to work on the vette.
Any hardward store sells them. For short-term, you could probably use any bolt***...But, grade 8 or stainless works best. They are 3/8" x 16 pitch IIRC. The link above probably specifies.

You can even use allen head (cap screws) for appearance.


***I say this because it looked like I got plain old zinc bolts from the manufacturer of my headers.
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Old Jul 5, 2011 | 10:52 AM
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Originally Posted by WW7
Those gaskets are the best...WW
I use these with my full length headers. Since the install, I've never had a leak and never had to re-tighten the bolts. Great product.
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Old Jul 5, 2011 | 11:07 AM
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my em longtubes have more of a round port than a d port,with the percy gaskets work with the Em longtubes?
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Old Jul 5, 2011 | 02:05 PM
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Originally Posted by 92lt1vet
my em longtubes have more of a round port than a d port,with the percy gaskets work with the Em longtubes?
In a simple response, yes

My hooker headers have a large square port but the heads are D port and that is what you reference when buying the gaskets
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Old Jul 5, 2011 | 03:40 PM
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Originally Posted by ultraviolet70
Forget double gaskets. Run Percy dead soft aluminum they're thick and soft and conform very well to imperfections. This way you don't have to take them off again later to redo.
I've run them and had great luck.

http://www.summitracing.com/parts/PHP-66031/
Originally Posted by WW7
Those gaskets are the best...WW
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Old Jul 5, 2011 | 04:35 PM
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ok thanks for the info,i ordered the gaskets and the percy header bolts
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Old Jul 5, 2011 | 08:45 PM
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Originally Posted by marcus410
Will these work w/Hooker headers, they are a round port?

or would these be better w/Hookers
http://www.jegs.com/i/Percys/760/660...oductId=744841

Last edited by surfer93; Jul 5, 2011 at 08:57 PM.
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Old Jul 22, 2011 | 12:17 PM
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Originally Posted by ultraviolet70
Forget double gaskets. Run Percy dead soft aluminum they're thick and soft and conform very well to imperfections. This way you don't have to take them off again later to redo.
I've run them and had great luck.

http://www.summitracing.com/parts/PHP-66031/
It does not say on the package, but do they go on with the flat surface facing in or out?
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