Dual Exhaust + Cat

Modified FSJ Tech Area
nimslerpon
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Joined: Sat Oct 28, 2017 1:58 pm

Dual Exhaust + Cat

Postby nimslerpon » Tue May 15, 2018 5:53 pm

I am in the process of installing all the wonderful EPA components on my ‘79 J10 and as I started poking through the manual, I realized the Catalytic converter in the diagram is set up for a single-pipe exhaust. I have 2 separate pipes coming off the manifold and they don’t converge at any point, so I am now trying to figure out what to do. For the purpose of passing the physical inspection, I might get away with just tacking the cat on to 1 of the pipes and calling it good, but I wanted to see if anyone else here has some better insight on this.Image

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Stuka
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Re: Dual Exhaust + Cat

Postby Stuka » Tue May 15, 2018 9:11 pm

Typically to pass emissions you need a cat on both exhausts if you are running dual exhaust.
1981 J10 AMC 258 with HEI and Weber 32/36 DGEV Carb, T176, NP208, D44/M23 with 4.56 gears and Detroit Locker, 6" lift, 33x12.50 Cooper STT's, BJ's Offroad Rear Dozer Bumper.
2017 JKU Rubicon Stock, but not for long!
Pevious Jeeps: 1975 Cherokee, 2008 JK, 2005 KJ, 1989 XJ

nimslerpon
Posts: 15
Joined: Sat Oct 28, 2017 1:58 pm

Re: Dual Exhaust + Cat

Postby nimslerpon » Sat May 26, 2018 2:04 pm

True. Well I’ll talk to a local muffler/emissions shop and see if they have any solutions.

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Stuka
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Re: Dual Exhaust + Cat

Postby Stuka » Sat May 26, 2018 6:51 pm

Any custom shop should be able to do what you want. Its nothing unusual or difficult.
1981 J10 AMC 258 with HEI and Weber 32/36 DGEV Carb, T176, NP208, D44/M23 with 4.56 gears and Detroit Locker, 6" lift, 33x12.50 Cooper STT's, BJ's Offroad Rear Dozer Bumper.
2017 JKU Rubicon Stock, but not for long!
Pevious Jeeps: 1975 Cherokee, 2008 JK, 2005 KJ, 1989 XJ

nimslerpon
Posts: 15
Joined: Sat Oct 28, 2017 1:58 pm

Re: Dual Exhaust + Cat

Postby nimslerpon » Mon May 28, 2018 6:40 pm

Stuka wrote:Any custom shop should be able to do what you want. Its nothing unusual or difficult.

Awesome. Thanks!


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