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post #1 of 8 Old 09-22-2017, 09:23 AM Thread Starter
country47
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2001 header

Hi guys I just got a 2001 Cherokee from my wife's grandmother, it overheated and lost water all the time, checked it out and it had a cracked head. So it's all torn down right now, but while I have it apart I'd like to put on a header. The problem is I can't seem to find a straight answer to if I can use like 98 header on it? I've heard it's because of the cat setut, which is easy to modify, or is it because of the ports on the head? Or can I use a 2000 up Wrangler header? Thanks


current: 76' chevy k10 "big blue"
R.I.P. 89' mj, 77' j10, 93' zj
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post #2 of 8 Old 09-22-2017, 05:20 PM
bluejunior
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Quote:
Originally Posted by country47 View Post
Hi guys I just got a 2001 Cherokee from my wife's grandmother, it overheated and lost water all the time, checked it out and it had a cracked head. So it's all torn down right now, but while I have it apart I'd like to put on a header. The problem is I can't seem to find a straight answer to if I can use like 98 header on it? I've heard it's because of the cat setut, which is easy to modify, or is it because of the ports on the head? Or can I use a 2000 up Wrangler header? Thanks
It is illegal to modify the cat setup, and yes the precats prevent it from having a traditional "header" as most people use the term. There's really not much to be gained by just that beside replacing a cracked stock manifold. What are you trying to accomplish?

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post #3 of 8 Old 09-23-2017, 09:05 AM Thread Starter
country47
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No emissions were I live, I'll keep the main cat under the Jeep. But as far as the header goes, same reason as anyone, looks cools sounds good and little bit of extra pep in the step. But if it's only that cats and not head ports that's good news. Thank you

current: 76' chevy k10 "big blue"
R.I.P. 89' mj, 77' j10, 93' zj
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post #4 of 8 Old 09-23-2017, 07:33 PM
MaskedMallard
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Not that it might matter, but here are questions I asked Borla about a Exhaust Header for my 2001 XJ.

Hi,
I have a 2001 Jeep Cherokee XJ Sport. I have already installed the Cat Back Exhaust on my Jeep. The question I have is:

Does Borla make a Exhaust Header for the 2000 / 2001 Jeep Cherokee XJ? I see a Exhaust Header listed for a 2000 - 2006 Jeep Wrangler TJ & Unlimited with the 4.0 liter I-6 engine.

Can you explain to me why this will / will not work? There appears to be enough room in the engine bay. After all, I believe both Jeeps have the same engine. Competitors have Exhaust Headers for the same set up.


Here is Borla's response.

Borla did not make a Header after 1997, per the last XJ has a different 4.0L engine in it with a cast iron exhaust manifold, the body style was discontinued in 2001. Hope this helps
Thanks Again,

Visit our website at: www.borla.com
Connect with us:

Steve Williams | Customer Service / Warranty / Tech

Borla Performance Industries, Inc.
701 Arcturus Ave, Oxnard, CA 93033

Toll-Free 877.462.6752 Ext. 247 Direct: 805.246.6062


Can someone explain to me why Borla's competitors Exhaust Manifold Headers will work (see 2000-2006 Wrangler TJ & Unlimited), but yet Borla's Exhaust Manifold Headers will not work for the 2000/2001 XJ?

http://www.jeepforum.com/forum/f11/a...ffered-502290/

XJ Cherokee
https://www.quadratec.com/products/17604_11X_PG.htm
https://www.quadratec.com/products/17601_500_07.htm

Wrangler TJ & Unlimited
https://www.quadratec.com/products/17601_07_07.htm
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post #5 of 8 Old 09-23-2017, 10:09 PM
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Thorley torque tubes seem to be very popular for late models. I doubt just the header will provide any measurable additional "pep" without some modifications to the inake and the rest of the exhaust. Even those tend to be pretty minor in the late model XJ's. They need something major like playing with the bore and stroke, forced air, something.

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post #6 of 8 Old 09-23-2017, 10:59 PM Thread Starter
country47
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Quote:
Originally Posted by MaskedMallard View Post
Not that it might matter, but here are questions I asked Borla about a Exhaust Header for my 2001 XJ.

Hi,
I have a 2001 Jeep Cherokee XJ Sport. I have already installed the Cat Back Exhaust on my Jeep. The question I have is:

Does Borla make a Exhaust Header for the 2000 / 2001 Jeep Cherokee XJ? I see a Exhaust Header listed for a 2000 - 2006 Jeep Wrangler TJ & Unlimited with the 4.0 liter I-6 engine.

Can you explain to me why this will / will not work? There appears to be enough room in the engine bay. After all, I believe both Jeeps have the same engine. Competitors have Exhaust Headers for the same set up.


Here is Borla's response.

Borla did not make a Header after 1997, per the last XJ has a different 4.0L engine in it with a cast iron exhaust manifold, the body style was discontinued in 2001. Hope this helps
Thanks Again,

Visit our website at: www.borla.com
Connect with us:

Steve Williams | Customer Service / Warranty / Tech

Borla Performance Industries, Inc.
701 Arcturus Ave, Oxnard, CA 93033

Toll-Free 877.462.6752 Ext. 247 Direct: 805.246.6062


Can someone explain to me why Borla's competitors Exhaust Manifold Headers will work (see 2000-2006 Wrangler TJ & Unlimited), but yet Borla's Exhaust Manifold Headers will not work for the 2000/2001 XJ?

http://www.jeepforum.com/forum/f11/a...ffered-502290/

XJ Cherokee
https://www.quadratec.com/products/17604_11X_PG.htm
https://www.quadratec.com/products/17601_500_07.htm

Wrangler TJ & Unlimited
https://www.quadratec.com/products/17601_07_07.htm
I've wondered the same, id assume the header would be the same, with the collector pipe being different down to cat

Quote:
Originally Posted by bluejunior View Post
Thorley torque tubes seem to be very popular for late models. I doubt just the header will provide any measurable additional "pep" without some modifications to the inake and the rest of the exhaust. Even those tend to be pretty minor in the late model XJ's. They need something major like playing with the bore and stroke, forced air, something.
I was planning to do a full exhaust, bored TB, cold air or cowl intake, and an injector upgrade ect... But since i have it all apart it'd be convenient, although it only took me roughly an hour and half to pull the head. do the later model XJ's not take to mods as well as the olders?

current: 76' chevy k10 "big blue"
R.I.P. 89' mj, 77' j10, 93' zj
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post #7 of 8 Old 09-24-2017, 08:07 AM
bluejunior
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Quote:
Originally Posted by country47 View Post
I was planning to do a full exhaust, bored TB, cold air or cowl intake, and an injector upgrade ect... But since i have it all apart it'd be convenient, although it only took me roughly an hour and half to pull the head. do the later model XJ's not take to mods as well as the olders?
Kinda. One of the most noticeable intake/exhaust mods for the older ones is to swap to the later intake which you've already got. By 01 there's really just not much improvement to be had that isn't already there stock, at least in terms of simple bolt ons.

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post #8 of 8 Old 09-26-2017, 09:59 AM
Newtons3
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The header for the TJ ....SHOULD ..... work. It has always been a direct git between the two vehicles for me. My J A on my '06 TJ fits perfectly on my '01 XJ.

The cast iron manifolds are fairly restrictive. But, you aren't usually flowing enough air to notice a lot of difference , as others have stated, without other modifications. The tubular exhaust will help, you can usually feel a difference, but it is minimal and not usually with the expense when performed alone.

Now, with a flowed head, significant camshaft profile changes, injectors , a tune, and a dramatically free-range flowing exhaust. There is much to be gained.
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