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Jeep 4.0 Header #2379839
10/01/17 11:30 AM
10/01/17 11:30 AM
Joined: Jan 2003
Posts: 8,005
Tulsa OK
Bad340fish Offline OP
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Bad340fish  Offline OP
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I heated up and welded the cracks in my 4.0 header when I put the stroker in 14 years ago. It cracked again awhile back and it is starting to leak enough that it annoys me, I also want to put a quieter muffler on it that will make it that much worse.

I haven't looked at the 4.0 market in at least 5-8 years, does anyone have any expierience with a good cost effective header? Looking for build quality more than performance, I can't see any of them making much difference over the stock one power wise. This is four a 97 4.0 XJ

I think I will upgrade to the later model intake while I have all that crap off. My poor little XJ needs some restoration so I will probably show it some love this winter.


68 Barracuda Formula S 340
87 "Chrysler" Conquest
Re: Jeep 4.0 Header [Re: Bad340fish] #2379913
10/01/17 01:21 PM
10/01/17 01:21 PM
Joined: Jan 2010
Posts: 1,073
st.cloud fl
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d-150 Offline
Smarter than a 5th grader?
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PERFORMANCE WIZE NOT MUCH DIFFERENCE.THE DOWNTUBE IS WHERE RESTRICTION IS. I BOUGHT A HEADER OFF EBAY THAT HAD LITTLE RIBS,I GUESS FOR EXPANSION.JEEP DID A ARTICLE ON THE LATER INTAKE AND DIDNT GAIN ANYTHING SORRY FOR THE CAPS I AM NOT SHOUTING LOL

Last edited by d-150; 10/01/17 01:27 PM.
Re: Jeep 4.0 Header [Re: Bad340fish] #2379916
10/01/17 01:31 PM
10/01/17 01:31 PM
Joined: Jan 2003
Posts: 8,005
Tulsa OK
Bad340fish Offline OP
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Bad340fish  Offline OP
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Yeah I had heard that about the intake, I think I have one in my shed if I don't I probably will just keep the old one. I thought it might help since its a larger than stock engine but who knows, it runs plenty good as is.


68 Barracuda Formula S 340
87 "Chrysler" Conquest
Re: Jeep 4.0 Header [Re: Bad340fish] #2380626
10/02/17 03:08 PM
10/02/17 03:08 PM
Joined: Feb 2003
Posts: 21,318
Manitoba, Canada
DaytonaTurbo Offline
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Posts: 21,318
Manitoba, Canada
I would find another stock manifold. The stock ones were actually fairly good.

Re: Jeep 4.0 Header [Re: Bad340fish] #2380846
10/02/17 09:13 PM
10/02/17 09:13 PM
Joined: Mar 2005
Posts: 3,131
Central NC
gch Offline
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Central NC
I considered one on my old cherokee.Sold it before I dumped too much money into it.
For no more than they cost one of the Chinese ebay headers is worth a shot.A dynomax super turbo would be quiet enough or just a stock muffler.

Re: Jeep 4.0 Header [Re: DaytonaTurbo] #2380915
10/02/17 11:02 PM
10/02/17 11:02 PM
Joined: Jan 2003
Posts: 8,005
Tulsa OK
Bad340fish Offline OP
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Bad340fish  Offline OP
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Tulsa OK
Originally Posted By DaytonaTurbo
I would find another stock manifold. The stock ones were actually fairly good.


For several years almost all of my friends had XJ cherokees, and everyone one of them had an exhaust leak from a crack in the stock header. The exception being one that was an 01 so it had a cast manifold. My welded stock one lasted far longer than I thought it would.


68 Barracuda Formula S 340
87 "Chrysler" Conquest
Re: Jeep 4.0 Header [Re: gch] #2380921
10/02/17 11:06 PM
10/02/17 11:06 PM
Joined: Jan 2003
Posts: 8,005
Tulsa OK
Bad340fish Offline OP
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Bad340fish  Offline OP
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Originally Posted By gch
I considered one on my old cherokee.Sold it before I dumped too much money into it.
For no more than they cost one of the Chinese ebay headers is worth a shot.A dynomax super turbo would be quiet enough or just a stock muffler.


A super turbo is what I thought about putting on actually. I would like some exhaust note but not near as much as I have now.

It doesn't have a catalytic converter on it right now and has a 2.5" pipe with a 40 series FlowMaster...........it's way to loud as I get older lol. I also thought about putting a glass pack inline in front of the flow master, might keep the sound but quite it down some.


68 Barracuda Formula S 340
87 "Chrysler" Conquest
Re: Jeep 4.0 Header [Re: Bad340fish] #2381083
10/03/17 03:31 AM
10/03/17 03:31 AM
Joined: Jan 2011
Posts: 4,785
Utah and Alaska
astjp2 Offline
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Utah and Alaska
I have a stroker, put in the $89 replacement header that has a bellows, no more cracks...after 10 years and 100K in the wife's heap and 11 years and 20K in my stroker heap...Installed the pacesetter cat back system, used the stock 98 and newer down pipe and rodded out the cat converter...
http://www.ebay.com/itm/JEEP-WRANGLER-GRAND-CHEROKEE-4-0L-IMPROVED-STEEL-EXHAUST-MANIFOLD-Gasket-KIT-/292270859435?fits=Make%3AJeep&hash=item440cb364ab:g:gdgAAOSwr81UTRyn&vxp=mtr

Last edited by astjp2; 10/03/17 03:33 AM.

1941 Taylorcraft
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1998 Wrangler
2008 Kia Rio
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I didn't do 4 years and 9 months of Graduate School to be called Mister!
Re: Jeep 4.0 Header [Re: Bad340fish] #2383752
10/08/17 09:59 AM
10/08/17 09:59 AM
Joined: Jan 2003
Posts: 8,005
Tulsa OK
Bad340fish Offline OP
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Bad340fish  Offline OP
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Thanks, that looks like the perfect one for what I am doing. So the 98 and newer downpipes doesn't have the dent for the driveshaft does? I think that is when they went low pinion with the D30.


68 Barracuda Formula S 340
87 "Chrysler" Conquest
Re: Jeep 4.0 Header [Re: Bad340fish] #2384083
10/08/17 08:25 PM
10/08/17 08:25 PM
Joined: Jan 2010
Posts: 1,073
st.cloud fl
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d-150 Offline
Smarter than a 5th grader?
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st.cloud fl
my 99 had the dent, but dont need it







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