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Go Back   Hummer Forums by Elcova > Hummer H2 Discussion Forums > Technical Discussion and Customizing your H2

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  #1  
Old 06-04-2013, 01:50 AM
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Default Manifold and Exhaust

So I have a broken manifold bolt, figured while I was in there changing it out I might as well swap the manifolds and all bolts.

Can anyone recommend a good set of headers that will work with the stock exhaust?

Will this work? http://www.ebay.com/itm/CHEVY-GMC-4-...0fb08a&vxp=mtr

Or this? http://www.ebay.com/itm/181152402419... 4.m1438.l2649
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Last edited by ryaleon : 06-04-2013 at 01:59 AM.
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  #2  
Old 06-04-2013, 11:45 PM
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Default Re: Manifold and Exhaust

I am curious too.
I am also wondering if there are any real gains to this.
I know some of the cheaper headers at some point had cracked when it came to other cars but I would like to see how these would work.

Btw ryaleon, it looks like we have the same taste in cars.
I have a 2003 H2 and a 99 Corvette heavily modded with more to be modded :-)
(and a 2004 M3 which is probably getting sold)
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  #3  
Old 06-05-2013, 12:19 AM
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Default Re: Manifold and Exhaust

Quote:
Originally Posted by jsbihn
Btw ryaleon, it looks like we have the same taste in cars.
I have a 2003 H2 and a 99 Corvette heavily modded with more to be modded :-)(and a 2004 M3 which is probably getting sold)

I'm actually going to sell my C6 sometime soon.....but only because I want the C7!
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  #4  
Old 06-05-2013, 07:00 AM
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Default Re: Manifold and Exhaust

I've mentioned many times that OBX has been proven quite a few times. Although cheap they essentially copy the big name brands and put out virtually the same product. When I had my GTO the vette guys went nuts over OBX.

Compare the price of Kooks LT's and OBX LT's and its a no brainer. Send them to get ceramic coated inside and out and you've got a great set of headers.

As far as gains, you won't get much with shorties-long tubes is where its at. That however means reconfiguring your entire exhaust where the shorties will bolt right in place of the oem manifolds.

When I eventually swap mine out I'll go with OBX simply due to the price. Still haven't decided whether to go with shorties or LT's. Probably shorties just because I have no interest in changing the stock exhaust.
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  #5  
Old 06-05-2013, 01:36 PM
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Default Re: Manifold and Exhaust

Obx seem like the way to go then. I too have no intentions of changing the stock exhaust.
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Old 06-05-2013, 01:50 PM
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Default Re: Manifold and Exhaust

I'm assuming that if the headers are compatible with an 07 they should be fine for 03-06 right?
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Old 06-05-2013, 11:26 PM
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Default Re: Manifold and Exhaust

C7 - grrrrrrr
(the vote is still out on whether on not i like the new vette)
well hey if i could i would hold on to my cars - too much blood, sweat, and cash into them

As for the headers, yeah i understand the difference between the long and the short. I have long on my vette.
Had long on my M3

Given, I would probably go long on the H2 and then do a straight back exhaust . probably straight H/X-pipe
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  #8  
Old 06-06-2013, 03:55 AM
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Default Re: Manifold and Exhaust

C7 looks so spiffy. Think I am going to be getting a C3 sometime soon.

Anyways ordered the obx shorties.
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Old 06-08-2013, 05:25 PM
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Default Re: Manifold and Exhaust

Quote:
Originally Posted by ryaleon
C7 looks so spiffy. Think I am going to be getting a C3 sometime soon.

Anyways ordered the obx shorties.

Yeah C3s are ok, but all the ones I know of always had some issues. Whether it was body or engine or electrical.

But hey it was the 70s
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  #10  
Old 06-10-2013, 12:59 AM
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Default Re: Manifold and Exhaust

Turns out I had two broken manifold bolts. One on the very back was sticking out quite a bit and was easy to get out...the other well...sigh. Tried a left handed drill bit and ez out. Drilled about 3/4 length of the bit. Tried the easy out. It bit down a bit and the bolt turned a bit. So it's not seized up or anything.
Anyways got greedy and attempted to drill full length of the bit so I could get a better bite with the ez out. Drill bit snapped and now I'm stuck. Sigh, fun stuff.
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Old 06-10-2013, 09:20 AM
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Default Re: Manifold and Exhaust

hmm well the bit shouldn't be too terrible to get out if you can grab a little chunk of the end with some needlenose.

On my old Camaro with aftermarket heads the same thing happened. Unfortunately the aluminum was so thin the bit actually punched through the top....talk about pissed!
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  #12  
Old 06-11-2013, 06:17 PM
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Default Re: Manifold and Exhaust

It's been pretty hard to get out so far. Haven't made any progress with the needlenose really. Any suggestions?
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  #13  
Old 06-11-2013, 08:45 PM
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Default Re: Manifold and Exhaust

The only thing I've done is drill a hole right next to the broken bit. The problem being the broken bit is harder than the broken stud. I haven't messed with mine at all so I'm not sure how hard it is room wise but maybe you can borrow a hammer drill?
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  #14  
Old 06-12-2013, 11:12 AM
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Default Re: Manifold and Exhaust

Is it possible you can notch it with a dremel or a flat head and hammer and then come in with a flat head and back them out?
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  #15  
Old 06-12-2013, 11:36 AM
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Default Re: Manifold and Exhaust

^that's an idea, maybe a small chisel. Also try warming the engine up to let me metal expand a bit. Just don't burn the hell out of yourself, been there too many times lol.
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Old 06-12-2013, 03:31 PM
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Default Re: Manifold and Exhaust

Find a washer with a hole just smaller that the stud size. Weld a washer to the stud, then weld a nut to the washer.
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  #17  
Old 06-14-2013, 10:32 PM
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Default Re: Manifold and Exhaust

Finally done! That was hell. I'd say if you can afford to take the deuce to a shop to remove broken manifold bolts....do it.
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  #18  
Old 06-15-2013, 01:47 AM
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Default Re: Manifold and Exhaust

how did you end up getting it out?
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  #19  
Old 06-15-2013, 05:54 AM
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Default Re: Manifold and Exhaust

I used a really small punch and beat on the broken drill bits ass. Then I was lucky enough to have the ez out grab a bite and backed the bolt out very slowly
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