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3.OL Headers & Manifolds       #: 2756
 Moderated by: Mike69, MaDMaXX,
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 Posted: Sun Apr 13th, 2025 12:50 am
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Anyone aware if there is a actual difference in the Vulcan 3.0L Manifolds/Headers between 2002-2009 OBD IIb and the 1994-2001 OBD 1/OBD IIa-OBD IIb ?

Perhaps OS sensor bung placement. I want to believe if there is any difference at all, that would be it. The 3.0L Vulcan should be the same all the way through correct?



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 Posted: Sun Oct 5th, 2025 10:15 pm
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I have 2 exhaust manifolds in the garage, neither one has an O sensor. That happens before the cat on both sides in the thin tubes.

I'm pretty sure I only saw one downstream after the merge in the3rd cat it don't need.

There is a bung in the driver side for the EGR tube goes upward.



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