2.5 vs. 4.0 exhaust down pipe - JeepForum.com
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post #1 of 3 Old 06-02-2010, 02:51 PM Thread Starter
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1986 XJ Cherokee 
Join Date: Apr 2007
Location: Sacramento, CA
Posts: 17
2.5 vs. 4.0 exhaust down pipe

Does anyone know if the exhaust down pipe (the one between the manifold and the catalytic converter) is the same for the 4 cylinder and the 6? I have this problem when I was told that my exhaust manifold has a leak and it turned out that it was the coupler where it attaches to the bottom end of the manifold (See pic below). Most guys on craigslist that are parting out their xjs have the 4.0 but I have the 2.5 engine. A muffler shop quoted me $100 but I have a guy willing to sell me a downpipe for $10 but he has a 4.0 engine.

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post #2 of 3 Old 06-03-2010, 08:37 PM
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4Cyl and 6 Cyl downpipes are not compatible. But you can purchase a new downpipe for roughly $60 at autozone or your local big-box autoparts store. One thing I always recommend when replacing stock exhaust piping is to give it a coating of high heat rust preventative paint prior to installation.

AutoZone Part # 349490

Good Luck
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post #3 of 3 Old 06-04-2010, 05:18 AM Thread Starter
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1986 XJ Cherokee 
Join Date: Apr 2007
Location: Sacramento, CA
Posts: 17
Hey thanks for your reply and taking the time to look it up. My neighbor actually referred me to a muffler shop that reflared that end for me for $30 bucks so it's quiet as a mouse now. Well, not really - now I can hear the power steering pump whine and that'll be the next project.

Thanks again.
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