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Thorley Header Project Update

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Old 03-23-2010, 04:56 PM
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Mine were reused when they pulled the OEM manifolds off during the mocking up phase.
Old 03-23-2010, 05:01 PM
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I would not use factory gaskets, the flange eyeballs a little on the thin side and I would be afraid of leaks. I would go get a quality copper gasket and pop the extra coin on stage 8 locking bolts. Unless you want to spend an hour re-tightening header bolts every few months until they rust on good and tight.
Old 03-23-2010, 05:39 PM
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Originally Posted by 06 SS
I would not use factory gaskets, the flange eyeballs a little on the thin side and I would be afraid of leaks. I would go get a quality copper gasket and pop the extra coin on stage 8 locking bolts. Unless you want to spend an hour re-tightening header bolts every few months until they rust on good and tight.
This. I would not trust an OEM gasket on a 22,000 mile car (in my case) with a new set of nice headers. Get some sturdy new metallic (copper) ones.
Old 03-23-2010, 06:23 PM
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Originally Posted by BuickRacer
Mine were reused when they pulled the OEM manifolds off during the mocking up phase.
Have you made arrangements yet with Thorley to install your set yet?
Old 03-23-2010, 06:29 PM
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I just called a parts store and ordered new exhaust manifold gaskets, the computer there didn't list anything for a 2008 Grand Prix GXP so I got them to look into an 2005 GXP.
Should be the same.
Old 03-23-2010, 06:30 PM
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I wonder why this is taking so long...I can't wait!!
Old 03-23-2010, 06:35 PM
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I just got my hopefully one and only set in just now. Very nice quality... Can't wait to put them on...

-Mike
Old 03-23-2010, 06:45 PM
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They do not come with the gaskets
Old 03-23-2010, 06:52 PM
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No sir, no gaskets. I am going to get some felpro gaskets from Summit or Jegs. They are absolutely beautiful though. They better be after costing me 1300.00....

-Mike
Old 03-23-2010, 07:08 PM
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GM, uses steel shim exhaust manifold gaskets, which are very durable and reusable. They also maintain torque so replace them if you want too.
Old 03-23-2010, 07:11 PM
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Originally Posted by Mgpeagle
No sir, no gaskets. I am going to get some felpro gaskets from Summit or Jegs. They are absolutely beautiful though. They better be after costing me 1300.00....

-Mike
Was install that much?
Old 03-23-2010, 07:13 PM
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I didn't install them yet. I was charged twice for one set. I am still in negotiations on getting my money back. Hell, if wasn't for bad luck I'd have none.

-Mike
Old 03-23-2010, 07:17 PM
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Originally Posted by Mgpeagle
I didn't install them yet. I was charged twice for one set. I am still in negotiations on getting my money back. Hell, if wasn't for bad luck I'd have none.

-Mike
Well ****. They must have charged mine to yours because I'm still waiting on them to take the money and ship them. I even called them again to confirm that they had the go ahead.
Old 03-23-2010, 07:28 PM
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how much for the bolts and gaskets need part #s please and thanks
Old 03-23-2010, 07:29 PM
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Originally Posted by Mels SS
how much for the bolts and gaskets need part #s please and thanks
Any gaskets and bolts from summit for a LS motor will work fine.
Old 03-23-2010, 07:35 PM
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Its comes with bolts.
Old 03-23-2010, 07:36 PM
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It is very aggravating having to go through this crap. I need to pay rent in a few days...

Here are a few links for gaskets & bolts.

http://www.summitracing.com/search/?...0gaskets&dds=1

http://www.jegs.com/i/Mr.+Gasket/720/4805G/10002/-1

http://www.jegs.com/webapp/wcs/store...6+header+bolts

http://www.summitracing.com/search/?...%20bolts&dds=1

-Mike
Old 03-23-2010, 07:46 PM
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Originally Posted by Mgpeagle
It is very aggravating having to go through this crap.

Agreed. I was under the impression this stuff was included. It would have been nice to order this with the rest of my exhaust stuff so I could have used my $25 off cupon for summit. Oh well...
Old 03-23-2010, 08:13 PM
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AG,

It isn't the extra stuff I need to buy that aggravates me it's that I was charged twice for one set of headers. It seems like every time I do something that is on the expensive side for my car something gets messed up. Honestly, that's the crap I am talking about. 25 bucks here or there is one thing, 650.00 is another...

-Mike
Old 03-23-2010, 08:50 PM
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Mgpeagle Sorry for all the problems my friend


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