SJ Cherokee exhaust

FSJs, DJs, Willys, Jeepsters, etc.

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slumley1
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SJ Cherokee exhaust

Post by slumley1 » Sat Apr 14, 2012 9:32 am

I have an 82 Cherokee with an AMC 360 and stock exhaust manifolds. I have already pulled out the rusted nasty exhaust all the way back and installed a Walker y pipe. The Walker y pipe ends as a 2.5" pipe. I want to go immediately to 3", no cat, 3" Flowmaster Super 44, and tailpipe.

Is it a bad idea to go from a 2.5" collector pipe to 3" the rest of the way back?

RkyMtnH
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Re: SJ Cherokee exhaust

Post by RkyMtnH » Sat Apr 14, 2012 4:10 pm

Not really. It shouldn't be enough to notice, other than the sound.
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82jten
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Re: SJ Cherokee exhaust

Post by 82jten » Sat Apr 14, 2012 5:40 pm

you should use a muffler that has a 2.5" inlet and a 3" outlet
1982 J10
AMC 258,Mild cam, Clifford Intake, Edlebrock 500cfm carb, HEI ignition
T-18 Trans,NP208, Dana 44 front, AMC HD20 Rear
31x10.5x15 m/t's
Custom Camo Paint Job
Gone but never forgotten

2006 Ford Mustang GT
Hasn't been stock for a while. . .

2001 Vulcan 800a

1996 Stone White XJ
4.5" lift, 32" mickey Thompsons

slumley1
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Re: SJ Cherokee exhaust

Post by slumley1 » Sat Apr 14, 2012 7:35 pm

In did I should have. Since I've already ordered the 3" in 3" out, can I have an exhaustive shop weld in a reducer right before the muffler?

I figured I'll have a section of 2.5 after the y, where the cat would be, a reducer (or the opposite) to 3", and then the 3" muffler and tailpipe.

Good?

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82jten
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Re: SJ Cherokee exhaust

Post by 82jten » Sat Apr 14, 2012 11:11 pm

that could work
1982 J10
AMC 258,Mild cam, Clifford Intake, Edlebrock 500cfm carb, HEI ignition
T-18 Trans,NP208, Dana 44 front, AMC HD20 Rear
31x10.5x15 m/t's
Custom Camo Paint Job
Gone but never forgotten

2006 Ford Mustang GT
Hasn't been stock for a while. . .

2001 Vulcan 800a

1996 Stone White XJ
4.5" lift, 32" mickey Thompsons

slumley1
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Re: SJ Cherokee exhaust

Post by slumley1 » Sun Apr 15, 2012 9:38 pm

My Flowmaster was taking longer than expected to arrive so I looked it up on Amazon. I used an expired credit card to order. I gave this a lot of thought before reordering. I decided to just go with 2.5 all the way back. I ordered the same muffler in 2.5 and a Walker tailpipe. Should be much easier and cheaper this way. Now I just need to get a section of 2.5 from the Autoparts store to use as a "test pipe" where the cat used to be.

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OrangeSpear
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Re: SJ Cherokee exhaust

Post by OrangeSpear » Mon Apr 16, 2012 8:28 am

you can go larger towards then but not smaller.
If you start with 2.5 then you can end with 3.

renbert
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Re: SJ Cherokee exhaust

Post by renbert » Wed Apr 04, 2018 1:39 am

You should be fine though Flowmaster exhaust can be really loud.

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