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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 11-02-2012, 05:10 PM
Joe Joe is offline
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Default Re: Exhaust manifold bolt breaking?

well I've been fighting a case of procrastination on this very issue for months. In part because I was on the fence on trading the truck in. I finally fell off that fence on to the right side

Anyway I was originally going to go the route PDX took but after some thought I think I want to avoid the long tube headers and probable need for tune and such. I am now looking at this OBX header solution, http://www.ebay.com/itm/OBX-Exhaust-..._2735 wt_1145

I am assuming this are a direct swap with perhaps some very minor benefit but likely better then replacing with stock manifolds which surely will rust to crap in short order. Mine are shot and will need to be replaced.

Question I have is NO EGR is correct for 2003 H2, also anyone have experience with short headers and any thoughts.

Also looks like those Fastenal bolts are out of stock completely. Ordered and hoping its not a big issue but if it is any thoughts on the updated stock bolts which I suppose I could get from the stealership.
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  #2  
Old 11-02-2012, 05:13 PM
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Default Re: Exhaust manifold bolt breaking?

To be clear, I did not need a tune as a result of the LT headers. Not at all.

Call a local Fastenal and ask them to order them in for you. That worked for me for whatever reason.

I don't have much info on the short tubes a side from what you've already mentioned.
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Old 11-06-2012, 09:31 PM
Hellz Hellz is offline
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Default Re: Exhaust manifold bolt breaking?

did you have to replace the whole exhaust system with the long tubes?

i havent looked under my H2 in some time, so i dont remember the setup, but...

starting from the headers it connects to the Cats
from the Cats does it connect to the single long tube to the muffler?
or..

is the muffler and Cats welded to the same long tube that connects to the headers?

i guess basicly are the flanges that seperate the muffler from the Cats?

so you hook the LT up to the flange that goes to the muffler and removing the Cats portion all together?
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Old 11-06-2012, 09:44 PM
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Default Re: Exhaust manifold bolt breaking?

http://www.elcovaforums.com/forums/s...ad.php?t=42833
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2006 HUMMER H2
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Diablo InTune w/DiabLew Tune
Cognito Steering Support
OBX LT Headers
Air Raid Filter w/Tube
External Trans Cooler -Radiator Bypass
Corvette Servo
Rancho 9000 Adjustable Shocks-
Rancho Steering Stabilizer
20" Chrome Fuel Hostage - Cooper ST Maxx
Slotted Rotors/Ceramic pads/Steel Lines
Viper Smart Start
iPod/Video Interface
HID Head and Fog Lights
Optima Red Top w/ Priority Start Cut Off Mod
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