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Old 01-26-2014, 05:30 PM   #1 (permalink)
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Default DOHC ZC "HEADER" the proper one

Does anybody know who makes a good port matched header for the dohc zc???
The ports are miss aligned by aprox 8mm.

The only ones I have found are obx ss style header and still not sure on if they are correct on the title or like all the others that say fit all d series engines sohc and dohc 88-00 with is B.S.

Any info would be awesome thanks

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Last edited by eddcartes; 01-26-2014 at 05:38 PM.
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Old 01-26-2014, 05:39 PM   #2 (permalink)
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You should delete your comment about the lower covers.. there is a fs/wtb forum but u need to meet the credentials first...

Zc aftermarket support is very limited.

I'm assuming your talking about the exhaust manifold?. All the sohc d headers bolt right up...and the 8mm difference is quiet an exaggeration. 20-30 minutes with a dremel and you'll be fine.

OEM manifolds are still floating around. But they are few and far between.
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Old 01-26-2014, 06:18 PM   #3 (permalink)
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Yes but I don't want to grind away at a header... yes it will be fine I have done it before and built lots of d series engines. I have lots of Oem zc header style manifolds. But I was wanting one which needed no fabricating at all. 8mm is the exact off set of the zc sport header flange on the zc dohc ports.
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Old 01-27-2014, 05:17 AM   #4 (permalink)
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You can grind away at a DC header to port match, or you can use a stock DOHC ZC manifold/pipe which flow good for a factory header but just doesn't look pretty.

Or have someone custom make you one for $$$.
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Old 01-27-2014, 06:19 AM   #5 (permalink)
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If you don't wanna cut it then coustom is the only way to go. Unless you go back stock headers
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Old 01-27-2014, 08:51 AM   #6 (permalink)
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SMSP

I had him make one for a customers engine. Ports lined up perfectly.
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Old 01-27-2014, 09:32 AM   #7 (permalink)
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If you donít mind buying used and up for some hunting, you can find used ZC headers from the Euro and JDM markets floating around sometimes. I managed to pick up one made by RS*R a little while ago.

As far as I know there are no current big volume sales header makers still building them, your best bet if you really donít want to port out a regular D16 header is to have one custom made, but I assume it will be expensive.
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Old 01-27-2014, 02:21 PM   #8 (permalink)
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Did the zc dohc "euro" come with a stock steel tube header (not cast)... ?

If so where could I get one and does anyone have any pictures
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Old 01-28-2014, 12:18 AM   #9 (permalink)
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as far as i know euro zc e.g. d16z5 have cast 4-1 header
d16a9 cast 4-2 + welded pipe 2-1 w/o place for OS
here's a pic
d16z6 with a cast 4-2 + 2-1 welded with a place for OS in 4-2 here it is
and the only full-welded OEM header - d16y8 one
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Old 01-28-2014, 07:56 AM   #10 (permalink)
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Quote:
Originally Posted by neubie View Post
You should delete your comment about the lower covers.. there is a fs/wtb forum but u need to meet the credentials first...

Zc aftermarket support is very limited.

I'm assuming your talking about the exhaust manifold?. All the sohc d headers bolt right up...and the 8mm difference is quiet an exaggeration. 20-30 minutes with a dremel and you'll be fine.

OEM manifolds are still floating around. But they are few and far between.
Wait are you say SOHC D d series Exahust manifold will bolt to dual overhead ZC?....If so that is kind of a cool thought.
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Old 01-28-2014, 07:58 AM   #11 (permalink)
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Quote:
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Wait are you say SOHC D d series Exahust manifold will bolt to dual overhead ZC?....If so that is kind of a cool thought.
Bolts up fine but the ports are off and need a little TLC with a grinder/dremel.
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Old 01-28-2014, 01:54 PM   #12 (permalink)
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8mm? That's unpossible. AT MOST you should have about 2mm offset.
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Old 01-28-2014, 03:30 PM   #13 (permalink)
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Nope it is 8mm... Anyways don't need people telling me it can't be or shouldn't be ... It is and I wanted to know what header will fit I have found one thanks guys
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Old 01-28-2014, 03:51 PM   #14 (permalink)
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Post some pics then please...this is the first that I've heard of such a difference
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Old 01-28-2014, 08:10 PM   #15 (permalink)
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There is a Real NICE OBX R ZC Header on Ebay like 200 bucks buy now
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Old 01-28-2014, 09:32 PM   #16 (permalink)
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Quote:
Originally Posted by Circletrack10 View Post
Nope it is 8mm... Anyways don't need people telling me it can't be or shouldn't be ... It is and I wanted to know what header will fit I have found one thanks guys
How much overlap you have probably depends a lot on the header primary size.
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Old 01-30-2014, 12:40 PM   #17 (permalink)
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Nope it is 8mm... Anyways don't need people telling me it can't be or shouldn't be ... It is and I wanted to know what header will fit I have found one thanks guys
I don't believe you. *shrugs*
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Old 01-30-2014, 10:47 PM   #18 (permalink)
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I don't understand why you are so adamant on having a header specifically designed for a ZC/d16a9/d16a8, when an SOHC with some very mild modification will do exactly the same job, with very little/no deduction in performance.

SOHC mainfolds are in abundance and on the most part are relatively cheap.

Any reason why you dont want to mod an SOHC manifold?
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Old 02-02-2014, 06:41 PM   #19 (permalink)
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1# tech at the track I race at...
2# I'm picky
3# performance is a must
4# can't a guy just get a straight answer with out people questioning you're choices...

BTW --- Acid beaver I don't care what you think or what you believe.
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Old 02-02-2014, 06:54 PM   #20 (permalink)
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First 3 are all understandable valid points.

However #4...this is the first report of such a large offset that I've heard of ...pretty sure as well for a lot of other people...

So with that said...its gonna be pretty tough to get a straight answer... just post up a couple pics so.we can see what your talking about.

I personally have hogged out 3 different steel tube manifolds ( sohc) and the offset was not as dramatic as your talking about...ya the cast HF manifold required more finesse ...but still workable
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