Headers for the 4.3

Headers for the 4.3

Postby tigerpwr [OP] » April 9th 2008, 7:07am

Are there headers that bolt up to the Astro?

My friend has a pair from his 95 Blazer before he did a v8 swap, is there any chance these would fit my van?
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Re: Headers for the 4.3

Postby tigerpwr [OP] » April 20th 2008, 7:56am

Got headers??? Somebody has to...patiently waiting :sleep:
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Re: Headers for the 4.3

Postby totm12 » April 21st 2008, 3:13am

i do but unfortunately, they are custom built ones.....about 2.5 big ones....work good though!!!!!!
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Re: Headers for the 4.3

Postby doyoulikeithere » April 30th 2008, 6:20am

Hi There. I'm a newbee, lol.
I have an 87 astro 4.3 with a hydraulic clutch/5spd.
I have 2 sets of hedman hedders. P/N 69400 and 69410.
They are supposed to fit s10/blazer 2wd and 4wd.
I am going to see if either of these fit my van when I put a new hiperformer SS 4.3 into it in a few weeks or so.
I will let you know if either set fits.
It looks like they might fit except for the clutch might interfere.
If not , I will have a few sets of headers for an s-10 for sale!!
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Re: Headers for the 4.3

Postby tigerpwr [OP] » April 30th 2008, 6:30am

Welcome, and good luck with that project :notify: when you're done be sure to post up some pics of your ride
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Re: Headers for the 4.3

Postby Mr_Roboto » July 6th 2008, 2:08am

keep us updated, i am curious myself
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Re: Headers for the 4.3

Postby the dutch connection » September 14th 2008, 1:44pm

Hi! I have a astro 88,and i`ve installed hooker headers.they fit just fine 8-)
the partnumber is 2465HKR the sound is deep and the performance increased a lot! :layrubber:
I hope this helps you! later
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Re: Headers for the 4.3

Postby SSAstro » October 7th 2008, 1:41am

sweet the vans gettin headers in january with a new trans :driving:
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Re: Headers for the 4.3

Postby marcus38 » October 7th 2008, 2:02am

ive installed edelbrock headers on my 90 astro. the application fit same year s10 but i had to grind off about 1/2 in of the bell housing on the transmission so they wouldn t rub or vibrate against it. try your local GM dealer and ask em about s10 or blazer apps. got mine from summit racing.ceramics are about $4oo vs. tri-coated $250. check out mine at www.rides.minitruckinweb.com under chevy astro marcus38 ...L888rr
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Re: Headers for the 4.3

Postby doyoulikeithere » October 24th 2008, 4:43am

I didnt get either set of hedman headders to fit because the clutch lever and is a bit in the way. Oh well, all else is great witht he van .
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Re: Headers for the 4.3

Postby doyoulikeithere » November 10th 2008, 3:26am

I think either set of the heddman headders would fit with an automatic trans, but with my 5 speed, the clutch release lever is right where the headers want to be. Heres a few pic of the new engine. I couldnt use the hedders , so I used stock manifolds and crossover and made up a new 2.5 inch pipe all the way to the back with a real nice Glasspack - flowmaster setup and a 3 inch Stainless tip out behind the rear wheel.. Sounds great. Pretty loud, but not quite rude loud. Lotsa torque.
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Re: Headers for the 4.3

Postby violent b » November 29th 2008, 8:39pm

so what are you doing with the hedders? I'm starting to look around for hedders for my '95.
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Re: Headers for the 4.3

Postby Matrixx » November 30th 2008, 3:34pm

Hi doyoulikeithere
Those are great pictures. Where did you cut the support at? Or was it already split? Any pics of that split area would be great, Thanks. :)
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Re: Headers for the 4.3

Postby astro355 » November 30th 2008, 5:02pm

Matrixx wrote:Hi doyoulikeithere
Those are great pictures. Where did you cut the support at? Or was it already split? Any pics of that split area would be great, Thanks. :)


What support are you talking about?
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Re: Headers for the 4.3

Postby Matrixx » November 30th 2008, 7:51pm

I should have been a bit clearer with that, sorry folks. The rad support, I'm going to be replacing my motor soon and decided to go through the front which requires the radiator support to be cut. I have never done a re & re in the astro/safari so it will be a new venture for me to do, this is the original motor I'm pulling out of it.
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Re: Headers for the 4.3

Postby astro355 » December 1st 2008, 2:54am

Matrixx wrote:I should have been a bit clearer with that, sorry folks. The rad support, I'm going to be replacing my motor soon and decided to go through the front which requires the radiator support to be cut. I have never done a re & re in the astro/safari so it will be a new venture for me to do, this is the original motor I'm pulling out of it.


In the first gen vans, the center section of the radiator support is bolted in. No cutting required.
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Re: Headers for the 4.3

Postby Matrixx » December 1st 2008, 9:07am

Hi astro355
Hmm, why would GM do that then (make a 1 piece unit for the second gen.)? I read a bulletin about GM having done this (cutting the rad support) with special brackets available, then GM changed their mind on this procedure, and now recommends the engine to be dropped from below. I guess the question for me is why?

I still plan on cutting the rad support and pull the motor out through the front, "unless" their is a serious structure problem created by this method. That's what I'm concerned about. I checked out a couple of engine shops, and they still cut the rad support to Re & Re the motor. Would anyone have an answer to this question? Thanks. :)
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Re: Headers for the 4.3

Postby astro355 » December 1st 2008, 10:17am

I wish I had an answer for you. If I had to make an educated guess, I think GM changed it to save money. Making the radiator one whole piece would be cheaper than having to make two different pieces that get bolted together. :2:
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Re: Headers for the 4.3

Postby doyoulikeithere » December 1st 2008, 3:35pm

if you dont want to cut it, then lift the body off the subframe with your cherry picker. It isnt difficult.
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Re: Headers for the 4.3

Postby Matrixx » December 1st 2008, 4:33pm

Ok, thanks for the input folks. I'll ponder a bit more on this before making a decision. :)
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