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Old May 4, 2007 | 09:37 PM
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Default LS6 manifold swap question

Did a search but didn't find anything.

What mods are necesasary to install an LS6 manifold on an 02 LS1. I've heard that you have to modify the EGR system but not sure what you have to do.

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Old May 4, 2007 | 10:00 PM
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Originally Posted by RE AND CHERYL
Did a search but didn't find anything.

What mods are necesasary to install an LS6 manifold on an 02 LS1. I've heard that you have to modify the EGR system but not sure what you have to do.

Re'
A 2002 LS1 would have came with an LS6 manifold from the factory.

No need to install one
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Old May 4, 2007 | 10:07 PM
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You already have one. You will have ZERO problem re selling the one you bought tho, that's the good news

-J
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Old May 4, 2007 | 10:07 PM
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How would I know for sure. I was under the impression that only a few came with the LS6 manifold.

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Old May 4, 2007 | 10:10 PM
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lol noooo all 01-02 cars came with LS6 intake manifolds. the easiest way to tell is that theres no EGR provision on the top toward the front of the intake manifold
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Old May 4, 2007 | 10:13 PM
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Originally Posted by RE AND CHERYL
How would I know for sure. I was under the impression that only a few came with the LS6 manifold.

Re'
You can know for sure because all 2001 and 2002 F-Bodies came with the LS6 intake manifold from the factory.

If you really want to though, you can look at the casting number on the side of the manifold (below the fuel rail, drivers side, center) and see that it is one of the following numbers: 88894339, 88890524, 88890523, or 12561184. All of those sorrespond to the F-Body LS6 Intake manifold.

Hope that helps.
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Old May 4, 2007 | 10:17 PM
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Originally Posted by RE AND CHERYL
How would I know for sure. I was under the impression that only a few came with the LS6 manifold.

Re'
Only a few came with the LS6 BLOCK, perhaps the statistic you were thinking of?

-J
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Old May 5, 2007 | 08:01 PM
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Originally Posted by ONEBADASSWS6
You can know for sure because all 2001 and 2002 F-Bodies came with the LS6 intake manifold from the factory.

If you really want to though, you can look at the casting number on the side of the manifold (below the fuel rail, drivers side, center) and see that it is one of the following numbers: 88894339, 88890524, 88890523, or 12561184. All of those sorrespond to the F-Body LS6 Intake manifold.

Hope that helps.
Crap. Well I guess not all 01-02 cars came with the LS6 manifold. The number on mine didn't match any of those numbers. Car is a 02 NHRA edition Firebird built June of 2002.

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Old May 5, 2007 | 10:06 PM
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Yes, all 01-02 cars came with the LS6 intake manifold from the factory. I think he was just giving you a few examples of part numbers that correspond to the LS6 intake manifold. I'm sure there are others. Did you buy the car new or used? I don't know why but maybe somebody previously swapped an LS1 intake manifold on there. What part number is on yours?

Last edited by Shallow Bay; May 5, 2007 at 10:13 PM.
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Old May 5, 2007 | 10:08 PM
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are you sure you dont have a better intake manifold on the car??? does it say FAST on the top lol??
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Old May 5, 2007 | 10:11 PM
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this makes me laugh...all 01-02 cars had the ls6 manifold hell some 02s got the block as well.unless you got the car used and some retard swapped for a vette ls1 manifold.believe it or not some dumbass was here a while back asking how to do this because his buddy wanted his manifold and he didnt care about the performance loss.
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Old May 6, 2007 | 07:48 AM
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The number on the manofold is 12573572.

I only know the cars history from mid 04. I was owned and not modded by a friend of my sons. It only had 5k on it when he bought it and apppeared to be stock with only a drop in K&N filter.

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Old May 6, 2007 | 02:55 PM
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That is definitely an LS6 intake manifold. Do a search on here with that part number and see what you come up with.
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Old May 6, 2007 | 10:53 PM
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Thanx guys. Looks like it is an LS6 manifold. Look what I found while searching the casting number.

GO HERE
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Old May 6, 2007 | 11:40 PM
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Here are the part numbers and instructions.

http://www.ls1howto.com/index.php?article=5
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