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Unread 04-10-2013, 05:32 PM   #1
tree33
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1998 TJ Wrangler 
 
Join Date: Nov 2009
Location: marion, oh, morgantown, wv
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Dual exhaust on my Tj

Ok, after the research on here I know this is a hated topic but im going to do it anyways since I feel like it. My manifold/header is cracked right where the two come together at so my plan is to chop it off right at the point is is broke, run pipe to the rear tires and shot it out in front of them, and put some mufflers in there some where. The rest of the exhaust is pretty much had it to and before someone say anything about the cat, its already gone. the main wondering is the o2 sensors. 98 tj 4.0 have a nice day

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Unread 04-10-2013, 07:57 PM   #2
Spud100
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Better not get rid of the cat or the up and down stream O2 sensors. The up stream (located right after the manifold on the down pipe) communicates and adjusts fuel/air and the down stream (located after the cat) will show that you don't have functioning pollution control. Might find yourself having to re-working the entire system to pass inspection.
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Unread 04-10-2013, 08:00 PM   #3
tree33
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well i don't exactly have inspections where i live and the upstream, doesn't it only make minor tweaking? like strictly on better mpg?
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Unread 04-11-2013, 05:53 AM   #4
cruiser54
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Quote:
Originally Posted by tree33 View Post
well i don't exactly have inspections where i live and the upstream, doesn't it only make minor tweaking? like strictly on better mpg?
No. The upstream is a major player here.
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Unread 04-11-2013, 10:08 AM   #5
tree33
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1998 TJ Wrangler 
 
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Posts: 76
well i unhooked it for now because there is no way it is reading right with the crack in the header. it seems to be acting fine but it has only been unhooked since sunday.
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