4.0 Header or stay OEM exhaust header?? - JeepForum.com
 
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post #1 of 10 Old 07-28-2015, 08:27 AM Thread Starter
bigwave
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4.0 Header or stay OEM exhaust header??

Anyone ever use one of these? I need to replace a cracked exhaust header on a ZJ 4.0. rodpartsdealer has a nice looking one for 120 bucks, anyone ever use one of these, anygood? Or should I stay stock / OEM.
Opinions??

Says 6-10 HP and nice tone... Opinions? Anyone ever try one? Not looking at the HP that's usually ??? But the tone might be nice.

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post #2 of 10 Old 07-28-2015, 08:32 AM
Jeepsr4me
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post a link so we dont have to search.
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post #3 of 10 Old 07-28-2015, 08:34 AM
Ironhead
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was the zj part a typo? if not, i cant help.

if it was, and you are looking for info on the 04 tj in your profile, then most definitely stick to oem. the aftermarket ones, especially the discount versions, are junk.

you are not going to see any power gain as the tj intake and exhaust is non restrictive. tone is more heavily influenced by your muffler.
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post #4 of 10 Old 07-28-2015, 08:40 AM
LaddieHanus
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If its this one http://www.ebay.com/itm/1991-1999-JE...item58aec7f878

Looks like a stock one to me. Doesnt even have the bellows on the front and rear pipe that helps with the manifold cracking.

Laddie Hanus

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post #5 of 10 Old 07-28-2015, 08:49 AM Thread Starter
bigwave
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Yep, thats it, but

Quote:
Originally Posted by LaddieHanus View Post
If its this one http://www.ebay.com/itm/1991-1999-JE...item58aec7f878

Looks like a stock one to me. Doesnt even have the bellows on the front and rear pipe that helps with the manifold cracking.
The stock go into a single smaller collector at the bottom, they look allot different than stock, looks to be much free er flowing.

Yes, it is for a ZJ but I also have a TJ and they, exhaust header(s) are interchangeable and engine is virtually identical. I figured someone here might have tried one.
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post #6 of 10 Old 07-28-2015, 11:03 AM
Jeepsr4me
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crack crack.... Is all I see... Not real power adder
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post #7 of 10 Old 07-28-2015, 11:12 AM
XTJake
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Quote:
Originally Posted by bigwave View Post
Anyone ever use one of these? I need to replace a cracked exhaust header on a ZJ 4.0. rodpartsdealer has a nice looking one for 120 bucks, anyone ever use one of these, anygood? Or should I stay stock / OEM.
Opinions??

Says 6-10 HP and nice tone... Opinions? Anyone ever try one? Not looking at the HP that's usually ??? But the tone might be nice.
I personally install stock style manifolds with the flexible sections in them. I've installed two of these so far and they seem to hold up better than the stock one did. I don't know how much more power is to be had from making the exhaust side more free flowing. That is to say, I don't know how restrictive the stock set up is.

If you give it a try, let us know how it bolts up and if you get any gains!

-Ryan

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post #8 of 10 Old 07-28-2015, 11:16 AM Thread Starter
bigwave
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Will Do

Quote:
Originally Posted by XTRyan View Post
I personally install stock style manifolds with the flexible sections in them. I've installed two of these so far and they seem to hold up better than the stock one did. I don't know how much more power is to be had from making the exhaust side more free flowing. That is to say, I don't know how restrictive the stock set up is.

If you give it a try, let us know how it bolts up and if you get any gains!

-Ryan
I'll let you all know what I end up with and how it goes. Thanks
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post #9 of 10 Old 07-28-2015, 06:46 PM
Denzien
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I don't believe a free-er flowing exhaust would do your low-end torque any favors anyway

2006 LJ
2013 MINI Cooper S Convertible, Highgate Edition
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post #10 of 10 Old 07-29-2015, 07:43 AM Thread Starter
bigwave
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Going to go stock AM-Autoparts

I'm looking at the one from AM autoparts for 80 bucks. It is one of the few with a warranty over one year. I've had good luck with their stuff in the past and 80 bucks with 10-year warranty, gaskets, 2-bolts. If it last 5, I'm sure that will be the life of this vehicle. It has the flex/expansion baffles built in. I did get a full new set of bolts/nuts/washers from Dorman and will lube up with high heat A.S.
Thanks for the advice fellows, and possible talking me out of ???? Who knows.
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