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Old 12-02-2017
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Default header for 4.0 inline 6
The exhaust manifold on our XJ cracked again. I had three OEM exhaust manifolds crack on me This last one had flex pipe on the main tubes and still cracked. Anyone hear running a header? Is there a power gain? Did it crack? What brand is it? Is there a header or a OEM manifold that wont crack? I would like to buy something that lasts.

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Old 12-02-2017
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Default Re: header for 4.0 inline 6
I can't run an aftermarket header on my Cherokee because of the pre-cats but I've heard good things about Banks headers. Things like quality of construction & power gains from reading the forums. I've seen them for $360 on eBay. Check this out:
The manifolds are fortified with a "revolver" collector which features Banks' patented "Power Pickle" exhaust collector technology. The Revolver manifolds feature a longer center tube in the 6 cylinder exhaust collector which captures exhaust pulse action and turns it into massive torque throughout the operating range. The manifolds also feature self-aligning exhaust seals that will never compress or blow out, double welded manifold tubes, and unrestricted manifold ports.
https://www.summitracing.com/parts/gbe-51327
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Old 12-07-2017
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Default Re: header for 4.0 inline 6
My 01 has the Banks Torque Tube header with the precats. IMO, you won't notice much power gains, unless the header is matched with a cold-air intake, larger throttle body, and larger catback exhaust.

My XJ had all the mentioned items, but I didn't really notice any gains. Then again, the parts were installed after the 37" tires and one-ton axles. There was a lot of weight to compensate for. In the end, I did a healthy stroker build this year. I'll update by build thread soon.
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Old 12-08-2017
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Default Re: header for 4.0 inline 6
Originally Posted by k9bxj View Post
My 01 has the Banks Torque Tube header with the precats. IMO, you won't notice much power gains, unless the header is matched with a cold-air intake, larger throttle body, and larger catback exhaust.

My XJ had all the mentioned items, but I didn't really notice any gains. Then again, the parts were installed after the 37" tires and one-ton axles. There was a lot of weight to compensate for. In the end, I did a healthy stroker build this year. I'll update by build thread soon.
David, would you by chance have a part number for your torque tube w/ pre cats? The ones I have found say they are for a Wrangler only.

Last edited by scottL; 12-08-2017 at 10:55 AM.
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Old 12-08-2017
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Default Re: header for 4.0 inline 6
Originally Posted by scottL View Post
David, would you by chance have a part number for your torque tube w/ pre cats? The ones I have found say they are for a Wrangler only.
The part # is 51306, it does not come with pre cats.

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Last edited by dzJeepChic; 12-08-2017 at 11:07 AM.
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Old 12-08-2017
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Default Re: header for 4.0 inline 6
Thanks G. Learn something new everyday
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Old 12-08-2017
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Default Re: header for 4.0 inline 6
I didn’t mean to imply that the Banks header came with precats. I just meant that the header is made for 2000+ Jeeps with the precats.
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Old 12-11-2017
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Default Re: header for 4.0 inline 6
Originally Posted by k9bxj View Post
I didn’t mean to imply that the Banks header came with precats. I just meant that the header is made for 2000+ Jeeps with the precats.
Thank you for clarifying.
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