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Old 11-26-2007, 10:54 PM   #1
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Do I have a header?

I know this sounds like a stupid question, but I just ordered a header, and I'm really hoping I don't already have one. I bought my Jeep with everything on it already, and nothing was ever mentioned about a header. I don't know what stock equipment looks like on these things. This a stock 4.0 manifold?

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Old 11-26-2007, 11:31 PM   #2
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Looks like it might be, but without seeing more of it I can't tell.

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Old 11-26-2007, 11:35 PM   #3
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Does the Wrangler come stock with a cast-type manifold, or a tubular header like that? How big are the stock primary tubes? I can measure that tube with a caliper at lunch tomorrow.
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Old 11-27-2007, 06:41 AM   #4
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dude clean your engine compartment before something goes wrong,,, that is a header
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Old 11-27-2007, 06:51 AM   #5
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X2 looks like a header to me from the top cause of the round tube.

However... if you look under your rig into the engine compartment there will be about 4 "tubes" coming down into one going into the exhaust pipe, thats a header... if not then you have a manifold, but pretty sure that's a header system.
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Old 11-27-2007, 07:13 AM   #6
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It's a header............
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Old 11-27-2007, 10:16 AM   #7
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Damn I guess I screwed up on that deal. To Craigslist it goes, I guess. Unless its a lot nicer than mine now, bigger primaries and stuff.
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Old 11-27-2007, 05:38 PM   #8
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what header did you buy??
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Old 11-27-2007, 05:43 PM   #9
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An eBay header, not sure of the brand. Thought it would be better than stock, not realizing I don't have stock. I kinda screwed up on this one...Really shoulda checked if I wasn't SURE about what I have. Ya live and ya learn. We'll just see when it gets here the size of everything and how it compares. Maybe its a lot better quality.
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Old 11-27-2007, 06:53 PM   #10
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To me that looks like the factory header. I bought my jeep completely stock and my header looked like that (round). Just to let you know, changing the header out on a 4.0l is not going to give you much gain in horsepower. A buddy of mine did that and did not see any change.
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Old 11-27-2007, 06:56 PM   #11
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Quote:
Originally Posted by bryan93yj View Post
To me that looks like the factory header. I bought my jeep completely stock and my header looked like that (round). Just to let you know, changing the header out on a 4.0l is not going to give you much gain in horsepower. A buddy of mine did that and did not see any change.
I'm not so much looking for power as a good sound, and less restriction. Thanks for the partially good news, making me feel like 35% less of an idiot than I did. Is there a sure-fire way to know what I have?
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Old 11-27-2007, 08:29 PM   #12
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That's the factory one in your pic.
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Old 11-27-2007, 08:31 PM   #13
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Damn that makes me feel a lot better. Thats sad how sure some people were its a header. Well the actual one arrived in the mail today right as I was getting home from work, so its goin on this weekend. I need the fuel line clip disconnector things, right? Any other particular tools most people might not have? Thanks guys
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Old 11-27-2007, 08:53 PM   #14
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Thats deff. the factory manifold. Let me know the sound you get because Im gonna get one off ebay for the same reason. Less restriction and good sound.
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Old 11-27-2007, 09:11 PM   #15
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That's definately a factory tube exhaust manifold...and prone to cracking in the lower flange area.

I got a great deal on a header on E-bay. The install wasn't all that difficult and I noticed a BIG difference in available torque (that's with the "butt dyno"...I have yet to run it on a REAL dyno...probably never will).

My header install came out of need...my factory junk cracked right where it did on my buddy's rig. Up next? A Dynomax cat-back system. I hope to get some nice rumble out of my old 6 popper.

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