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

Header gaskets

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Old Mar 1, 2012 | 09:11 AM
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Default Header gaskets

I bought a set of used long tubes and have everything but the header gaskets which I know I can just pick up at the parts stores. What kind should I go with? I've noticed some are circles and some are square ports. Which one should I get? This is for a 90 L98
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Old Mar 1, 2012 | 09:18 AM
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Long as it covers the port and seals it doesnt matter.

Fel Pro 1404 is popular and should fit no problem
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Old Mar 1, 2012 | 04:52 PM
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I think Fel Pro makes a D Port Gasket. Anyway I put a bead of red permatex on em before bolting em down. After it runs awhile with em on go back and snug em down again (bolts with a little anti sieze on em) Pipe
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Old Mar 1, 2012 | 06:24 PM
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If they make them for your car, I use Percy's - very pleased.
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Old Mar 1, 2012 | 06:51 PM
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Originally Posted by champ
If they make them for your car, I use Percy's - very pleased.
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Old Mar 1, 2012 | 08:00 PM
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Don't use paper gaskets or Fel-Pro.
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Old Mar 1, 2012 | 08:08 PM
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Why not? If he has a good quality header they wont leak.
Shoot Ive used stock exh gaskets with headers before
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Old Mar 1, 2012 | 08:29 PM
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Originally Posted by champ
If they make them for your car, I use Percy's - very pleased.
Percys on my LT1.

http://www.summitracing.com/parts/PHP-66031/?rtype=10
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Old Mar 1, 2012 | 09:12 PM
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Originally Posted by cuisinartvette
Why not? If he has a good quality header they wont leak.
Shoot Ive used stock exh gaskets with headers before
If a bolt come loose they will blow out. If they get wet they will blow out. Use the Copper or Aluminum gaskets. You can reuse them. Also try EARL'S. They have reusable inserts and if the headers warp, they will still seal.
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Old Mar 1, 2012 | 10:29 PM
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Used Felpro for years and many motors - no problems -
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Old Mar 2, 2012 | 10:49 AM
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Percys Dead Soft Aluminum for me

Never a leak and have never had to re-tighten the bolts since day 1. I installed the headers and that's it.
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Old Mar 2, 2012 | 11:43 AM
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I currently have copper gaskets on mine. They will not blow out but you've got to get them hella tight to not leak.

I've had good luck with dead soft aluminum on a friend's car. Also have to get tight to not leak.

Under no circumstances use the "paper" gaskets, unless you just like changing them every time you drive the car.
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Old Mar 2, 2012 | 11:50 AM
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Originally Posted by Nathan Plemons
Under no circumstances use the "paper" gaskets, unless you just like changing them every time you drive the car.
That's funny....I used FelPro on my AFR-headed, Try-Y Headered 383 and they've lasted 1.5 yrs. Didn't even have to re-tighten them. (Though I did recheck.)

May not be a testimonial for 10-yr use, but I don't have to change/tighten them every day either. I thing the bigger issue is how well-made (and thick) your header flange is.

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