post #1 of Old 07-09-2009, 01:39 AM Thread Starter
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4.0 exhaust question-headers?

So, I was just informed that all 4.0 engines came with headers from the factory, is this true?

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post #2 of Old 07-09-2009, 05:02 AM
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Not true - the 4.0 had an exhaust manifold. Yes, it's tubular in nature, giving some the impression that it's a "header." However, the tubing is not tuned in length, nor are there any collectors, and thus it's simply a manifold, not a header.

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