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ls6 intake crossover pipe

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Old May 24, 2005 | 06:38 PM
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Default ls6 intake crossover pipe

Hi all, anyone have the part number for the crossover pipe needed when going from a 97 LS1 intake to the LS6 intake.

anyone have a link to pictures of what and where this part attaches.

Thanks in advance for any guidance.
Tom
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Old May 24, 2005 | 07:33 PM
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Originally Posted by C4TOMCAT
Hi all, anyone have the part number for the crossover pipe needed when going from a 97 LS1 intake to the LS6 intake.

anyone have a link to pictures of what and where this part attaches.

Thanks in advance for any guidance.
Tom
There is a crossover pipe in the front that replaces the early LS1 design. There are also two rear individual plugs that are used as well.
The GM numbers:12568478 front pipe (includes new hose and
gaskets)
12562788 rear plugs (two required)
12551933 gaskets for rear plugs (two required)

Everything attaches in the same place(s) as your current set-up. When you remove your old manifold, it will be self-explanatory. The Z06 style manifold has a different design underneath that makes this necessary due to clearance issues.
There is also a small plastic clip that must be done away with as well. It is a retainer clip that holds the two knock sensor wires together and will interfere with the new manifold seating all the way down when installing. After removing the old manifold you will see it. Mine was green in color.HTH
Robert
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Old May 24, 2005 | 07:40 PM
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And here's a great tutorial with pics to illustrate.

http://ls1howto.com/index.php?article=5
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Old May 24, 2005 | 07:50 PM
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You can also grind down the bottom of the LS6 intake where it contacts the stock pipe to get the clearance you need
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Old May 24, 2005 | 09:31 PM
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Thanks for the links and reply on the parts. The forum members are AWESOME.
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Old May 24, 2005 | 09:52 PM
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Originally Posted by SFVetteman
You can also grind down the bottom of the LS6 intake where it contacts the stock pipe to get the clearance you need
True story! If you have a Dremel or other similar way to grind in the areas you need this, doing this will allow you to keep your original coolant pipes in place. To mark where your manifold needs to be cut, use some white paint (or other light color like yellow)and put a light coat on the original pipe where it goes underneath the manifold. Doing this while the pipe is still installed on the car is easiest. While the paint is still wet, lay the new manifold on top of it. Turn the manifold over and cut where you see the white.
Robert
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