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Old 06-09-2012, 01:05 AM   #1
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Is a Header worth it?

So my 92 was having major power loss. Turns out it was a clogged cat and I also have a cracked exhaust manifold. I am bypassing the cat but wondering what to buy for the manifold. Does a header really give you much performance increase over a new exhaust manifold with expansion joints like this one.

Original Replacement Parts 4883385K - Exhaust Manifold Kit for 91-99 Jeep® Wrangler YJ & TJ, Cherokee XJ & Grand Cherokee ZJ with 4.0L 6 Cylinder Engine - Quadratec

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Old 06-09-2012, 08:16 AM   #2
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That replacement part is essentially a header. And you arent gonna beat that price.

A stock cast manifold from chrysler is around 250 if you can find one. I was told by the local jeep dealer that they arent in the catalog anymore, but they are still out there.

I would take the 1 from Qtec myself but i have a 4.2L.

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Old 06-09-2012, 04:11 PM   #3
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Thats what I'll use on my new engine and and a head pipe for a Grand Cherokee to by pass the cat.
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Old 06-09-2012, 10:10 PM   #4
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Would stepping up to a Borla or Gibson type header get much noticeable performance increase. It's a lot of extra money but if it would be a improvement I may be willing to spend extra.
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Old 06-10-2012, 09:53 PM   #5
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I would think anything is better than the stock exhaust.
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Old 06-11-2012, 12:40 AM   #6
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With out a lot of high performance work on your engine you may not tell any thing, not even on a dyno.
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Old 06-11-2012, 09:11 AM   #7
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Thanks for the feedback everyone. I don't plan on doing any engine modifications or anything so sounds like the full on headers wont really be worth the money. I am going to order the replacement from my original post and enjoy a better flowing system. Thanks. The jeep already runs 1000 times better by getting rid of that clogged cat.

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