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Does any re-use the manifold flange from the trucks?

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Old Nov 9, 2011 | 03:06 PM
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Default Does any re-use the manifold flange from the trucks?
I am using a flipped passenger truck manifold on my turbo build and I got the manifolds with the stock flanges (and about 2 inches of pipe). Can I use these on my turbo build or should I shell out the 30 for a pre-made flange? Only thing that concerns me is the flange/manifold uses a donut gasket.
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Old Nov 9, 2011 | 05:01 PM
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If your worried, then ill sell you my old manifold flanges, I cut the flanges off so i could use v bands. this way they will bolt up and they are thick cast that wont warp or leak, just put a little ultra copper in between.

$10, or im gonna scrap em. lol
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Old Nov 9, 2011 | 06:46 PM
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i kept the factory flanges. i just replace the gaskets and havent had an issue
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Old Nov 9, 2011 | 07:32 PM
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Originally Posted by Tally TransAm
i kept the factory flanges. i just replace the gaskets and havent had an issue
So you run the donut on the passenger manifold?
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Old Nov 9, 2011 | 09:13 PM
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my truck manifolds have an oring type gasket, i missed yours had a donut gasket
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Old Nov 9, 2011 | 09:43 PM
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shows all the truck manifolds use it, this is the "gasket" for the passenger side:

http://www.ebay.com/itm/Genuine-GM-1...r#ht_500wt_716
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Old Nov 10, 2011 | 06:13 AM
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Send them to me, and I'll weld some vbands on them for ya.
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Old Nov 10, 2011 | 07:46 AM
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We have flanges ready to go setup for 2 1/2 pipe.
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Old Nov 10, 2011 | 09:17 PM
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Originally Posted by ModularTurbo
We have flanges ready to go setup for 2 1/2 pipe.
i pm'd you at like 8am this morning, no response.
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Old Nov 10, 2011 | 11:17 PM
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They are for sale on my website. Sorry i missed your PM I was super busy today.
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Old Nov 11, 2011 | 08:03 AM
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I too reused the stock flanges.
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Old Nov 11, 2011 | 10:12 AM
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I use the stock flanges and no gaskets. Just the copper RTV.
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Old Nov 11, 2011 | 10:31 AM
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Originally Posted by 98Z28CobraKiller
I use the stock flanges and no gaskets. Just the copper RTV.
this is what i have


are you guys just using the short piece of pipe and welding to that or what?
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Old Nov 11, 2011 | 10:34 AM
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and how do you run no gasket, seems like they dont meet up if there is no gasket (note how the flange has like legs that come down to the manifold)
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Old Nov 11, 2011 | 10:59 AM
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Just remove the donut gasket and apply some high temp RTV and bolt it right to the manifold.

There is plenty of flat area left to seal up.
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Old Nov 11, 2011 | 11:17 AM
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i guess i don't see how that'd work



the area between the stock flange and the manifold is set by the "legs" that come off the stock flange, even bolted up there is still a gap between the stock flange and the stock manifold if you don't run the donut.
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Old Nov 11, 2011 | 12:48 PM
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I kept the donut. But...you could always flip the flange around and weld the the pipe to the other side. It looks like it would sit flush that way.
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Old Nov 11, 2011 | 03:04 PM
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We were refering to aftermarket flanges that are flat like the ones on my site located here:

modularturbo.com/flanges
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