98 zj 4.0 exhaust options? looking for bolt on - JeepForum.com
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post #1 of 7 Old 04-07-2020, 09:32 AM Thread Starter
phacemeltar
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1998 ZJ 
 
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98 zj 4.0 exhaust options? looking for bolt on

as the title suggests, i’m looking to replace my exhaust system. the current system on the vehicle has some sort of leak in it and i want to change the whole (rusty) system. i would like something quieter and inexpensive but i am not trying to go to the muffler shop or deal with finding a welder (the last exhaust i had installed on my 97 avenger came with a saw hole in my oil pan)

any links or suggestions to a good kit i can do this with or a guide on fabricating a regular exhaust to meet my needs? i have time and a sawsall. having a hard time finding the proper search terms. thanks

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post #2 of 7 Old 04-07-2020, 10:26 AM
LordHobbit
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You can contact Kolak, pm here or [email protected]

If you want to go cheap, check out Walker Exhaust kit, https://www.walkerexhaust.com/find-my-part.html
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93 red ZJ 196k 4.0. Spent more money than I should have ...
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post #3 of 7 Old 04-07-2020, 12:10 PM
zjosh93
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The 98 4.0 already has the best factory front pipe (header to catalytic converter). It's mostly mandrel-bent 2.5" pipe to the converter. All the aftermarket front pipes I've seen are crush bent and will not flow very well. I'd see if you can find a good front pipe in the salvage yard and get a high flow cat and cat back from Kolak. You can use the aftermarket parts though if you really want to. They seal and will get your exhaust out the back.
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post #4 of 7 Old 04-07-2020, 05:04 PM
shaw0531
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I just put a walker muffler on from O’Reilly this weekend. Deeper sound than stock but real quiet on the highway.
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post #5 of 7 Old 04-12-2020, 02:54 AM
AlamoJeeper
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This thread might give you some ideas.

AlamoJeeper
- 1995 4.0L NP249 - mostly stock
- Link to rehabbing my 1995 ZJ.
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post #6 of 7 Old 04-13-2020, 12:05 AM
AlamoJeeper
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Quote:
Originally Posted by LordHobbit View Post
...If you want to go cheap, check out Walker Exhaust kit, https://www.walkerexhaust.com/find-my-part.html
On the Walker website, you can check the inlet and outlet diameters for the converter, muffler, and tailpipe for the 4.0 and 5.2 engines to get an idea of the potential flow and back-pressure characteristics of the 4.0 and 5.2 liter systems.

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- 1995 4.0L NP249 - mostly stock
- Link to rehabbing my 1995 ZJ.
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post #7 of 7 Old 04-15-2020, 01:19 PM Thread Starter
phacemeltar
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thanks, this is great info! nice work on the write up 👍🏼
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