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4.0 - cast exhast or tube headers?

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Old 01-30-2017 | 03:52 PM
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Default 4.0 - cast exhast or tube headers?
Pulling apart the 94 that a tree fell on,, I noticed the exhaust manifold is a "tube header" not a cast iron manifold I was expecting.
Did the 4.0 (94) come stock with "tube manifold" or cast ?


Slack
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Old 01-30-2017 | 04:26 PM
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Tube.. Plain ol thinwall tubing.
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Old 01-30-2017 | 04:29 PM
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They were tubes up through '99. The 2000 and 2001 had two piece cast iron manifolds, one for cylinders 1-3 and another for 4-6.
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Old 01-30-2017 | 05:07 PM
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Originally Posted by extrashaky
They were tubes up through '99. The 2000 and 2001 had two piece cast iron manifolds, one for cylinders 1-3 and another for 4-6.
Edit: Entered in error.


My exhaust manifold is welded tube construction.
Last edited by CCKen; 01-31-2017 at 06:30 AM.
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Old 01-30-2017 | 06:08 PM
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Originally Posted by CCKen
My '99 has a cast exhaust manifold.
I stand corrected.
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Old 01-31-2017 | 06:31 AM
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Originally Posted by extrashaky
I stand corrected.

No you're not. I revised my post.
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Old 01-31-2017 | 04:54 PM
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The 2000 and 2001 had two piece cast iron manifolds, one for cylinders 1-3 and another for 4-6.
wonder if that contributes to the cracked head??
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Old 01-31-2017 | 06:21 PM
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Good point


Originally Posted by nujeepguy
wonder if that contributes to the cracked head??
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