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Old 08-25-2010, 03:39 PM   #1
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headers

who uses what and what sucks or is awesome? do they make long tubes if they do i havent seen them

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Old 08-25-2010, 03:41 PM   #2
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The TJ 4.0L engine comes straight from the factory with headers, it does not use an exhaust manifold.

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Old 08-25-2010, 03:43 PM   #3
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I believe he is askig for aftermarket stuff dude. I'm going with Banks headers pretty soon
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Old 08-25-2010, 03:44 PM   #4
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I believe he is askig for aftermarket stuff dude. I'm going with Banks headers pretty soon
Be prepared for it to crack. Both the Banks and Borla headers have earned a reputation for cracking just as readily as the '97-'99 TJ 4.0L headers did until Jeep redesigned them to have flexible joints that are missing in Borla/Banks headers. And neither performs better than the stock OE header, despite the hype in their advertisements... dude.
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Old 08-25-2010, 03:54 PM   #5
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Quote:
Originally Posted by Jerry Bransford View Post
Be prepared for it to crack. Both the Banks and Borla headers have earned a reputation for cracking just as readily as the '97-'99 TJ 4.0L headers did until Jeep redesigned them to have flexible joints that are missing in Borla/Banks headers. And neither performs better than the stock OE header, despite the hype in their advertisements... dude.
Ive meant to ask jerry, where are they prone to cracking? I orginally had headers with the flex tube (Im assuming they were the stock) and I got a crack at the collector? Did I have a faulty/old part since the flex is supposed to prevent cracking?
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Old 08-25-2010, 04:05 PM   #6
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They typically cracked (caused by engine torque flexing them) where the engineers later added the two flex joints to cure the problem.

The flex joints can be seen in the first photo. The second and third photos shows Borla and Banks headers without the flex joints.
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Old 08-25-2010, 06:34 PM   #7
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Does no one make equil lenghth headers with flex joints?
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Old 08-25-2010, 06:37 PM   #8
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So .. what your saying it that my '99 4.0l has a stock header on it?
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Old 08-25-2010, 06:39 PM   #9
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Hmm well I could go with a Flowmaster header. What header would be good? I have to get mine replaced soon anyways because they're beyond old.
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Old 08-25-2010, 06:40 PM   #10
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What Jerry is saying is that just about any header without a flex section in it is much more prone to cracking. Other than that the choice is up to you...
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Old 08-25-2010, 07:35 PM   #11
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What Jerry is saying is that just about any header without a flex section in it is much more prone to cracking. Other than that the choice is up to you...
Hmmm okey dokey.
well my stock ones don't have flex points. Ill take a closer look at them when I get back to NC
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Old 08-25-2010, 08:58 PM   #12
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Since when did Flowmaster build headers?Do tell?????????
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Old 08-25-2010, 09:04 PM   #13
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i have a JBA on my TJ and so far knock on wood it has not cracked. They banks that was on there cracked thought but banks does have a lifetime warrrenty
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Old 08-27-2010, 08:04 AM   #14
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Borla header

I have a 2004 Wrangler 4.0 I purchased a borla headers for it but it is 2 pieces 3 ito 1 and 3 into one this fits the stock dual cats on the jeep. My question is has anyone heard of these cracking?
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Old 08-27-2010, 09:33 AM   #15
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Does no one make equil lenghth headers with flex joints?
There are not equal length or long tube headers for the 4.0. If you are looking for HP increases, headers are not really going to gain you anything. Bolt-ons (headers, air filters, mufflers or programmers) yield little to nothing on the 4.0 (or 2.5) motors. The best bet got gains is to stroke it.
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Old 09-09-2010, 09:53 PM   #16
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The TJ 4.0L engine comes straight from the factory with headers, it does not use an exhaust manifold.

what model because my 05 tj X sure has a manafold where do i find that sweet header?
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Old 09-10-2010, 12:44 AM   #17
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what model because my 05 tj X sure has a manafold where do i find that sweet header?
You're mistaken, all 4.0L engines come with a header.
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Old 09-10-2010, 02:32 AM   #18
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And neither performs better than the stock OE header, despite the hype in their advertisements... dude.

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