Needin' a new exhaust system for my '89 yj -
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Go Back > Models > Jeep Wrangler Forums > YJ Wrangler Technical Forum > Needin' a new exhaust system for my '89 yj

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Unread 08-14-2011, 12:43 PM   #1
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1989 YJ Wrangler 
Join Date: Aug 2011
Location: Laughlin, NV
Posts: 12
Needin' a new exhaust system for my '89 yj

Just picked up a 1989 yj with a 4.2L and a 5-speed trans in it and it just don't have the power that it should.
After diagnostic ... the exhaust system is shot! specifically, the catalytic converter is clogged and the muffler is falling a part

I'm looking to replace everything. including installing a new header. and i'm looking for any tips and/or ideas as far as... what are the good header brands for a Jeep(at decent prices), and would it be better if i went with stainless steal (since i do like driving through water).

And as for the rest of the system, since i live in southern nv., i don't need to deal with smog tests, so the catalytic converter can go. is there a bolt-on kit that will fit my Jeep from the header to tail pipe? or do i have to take 'er to the local muffler shop?

any one??

tia, PR2112.

p.s. i had a "flow master" on my 4 runner that i really liked. it sounded great!

and also what about the different sizes, 1 1/2", 2", bigger?

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Unread 08-14-2011, 04:33 PM   #2
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1995 YJ Wrangler 
Join Date: Jun 2011
Location: , PA
Posts: 805
I would personally just go to a custom exhaust shop and have them do a performance kit. It will cost more but it for sure beats fighting all the rusted bolts on the exhaust that are a problem on any car but even a bigger problem on YJs. I have a punched out cat, it got me a few extra ponies and sounds good. I have an after market mufler as well and it sounds good but I can never remember the name. To pick an exhaust that sounds good, go to youtube and listen to jeeps that are posted with your engine and what muffler you want to use. I think morris 4x4 has a complete bolt on kit that will let you select what parts you want to use if you want to skip the cat and add your own muffler, ect, ect.
DD- 1995 YJ 2.5L, Cat delete, 19lb injectors, 30/9.5r15
Trail Rig- 1994 YJ 4.0L, Rubicon Express 4.5inch lift, 1inch body, D30 Aussie, 33/12.5/r15 Cooper Mud Terrains, front bumper, rocker guards
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Unread 08-14-2011, 06:17 PM   #3
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1989 YJ Wrangler 
Join Date: Aug 2011
Location: Laughlin, NV
Posts: 12
Yeah i did the u tube thing and still want to stick with the flowmaster exhaust. i've seen a guy on utube with a flowmaster on a '91 yj, but not an '89. i also went to flowmasters site and tried to find a system for my year, but as low as they go is 1991!

the one on utube was a model d-40 iirc, and i can't remember which header he had, maybe a borla. but it sounded pretty bad-a$$.

so maybe i'll just buy a borla stainless header and a flowmaster muffler and have the guys at the local shop fab up what goes in-between!!

what do ya think?

oh, and he ran 2.25" pipe.

Last edited by PR2112; 08-14-2011 at 06:22 PM.. Reason: adding info.
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