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Hummer H3 For the Hummer driver who wants the rugged look and off road capabilities of the Hummer, but in a smaller size and with a more fuel economy friendly engine.

Am I reading this right?

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  #1  
Old 01-15-2021, 05:42 PM
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Ebay -

HUMMER H3 5.3 PASSENGER SIDE EXHAUST MANIFOLD 2008-2010 NEW OEM GM 12600527

#1 on Diagram Only-Genuine OE Factory Original Item


Can I really get exhaust manifolds for my H3 Alpha that don't have the Cat? Then I could go with real dual exhausts with no restriction!!! I have given up trying to find headers.
 
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Old 01-15-2021, 06:07 PM
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Alpha don't have the cats integrated.


 
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Old 01-15-2021, 06:35 PM
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So I can just unbolt the ones I now have?
 
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Old 01-15-2021, 06:43 PM
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Originally Posted by jpthomso
So I can just unbolt the ones I now have?
Yes, leave the manifolds intact.
 
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Old 01-15-2021, 07:18 PM
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wonderful
 
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Old 01-18-2021, 09:40 AM
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Originally Posted by jpthomso
Ebay -

Can I really get exhaust manifolds for my H3 Alpha that don't have the Cat? Then I could go with real dual exhausts with no restriction!!! I have given up trying to find headers.
I think you should take another look under your truck and note the exhaust path.
 
Last edited by Doc Olds; 01-18-2021 at 11:20 AM. Reason: typo
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Old 01-18-2021, 10:37 AM
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Originally Posted by jpthomso
Ebay -

HUMMER H3 5.3 PASSENGER SIDE EXHAUST MANIFOLD 2008-2010 NEW OEM GM 12600527

#1 on Diagram Only-Genuine OE Factory Original Item


Can I really get exhaust manifolds for my H3 Alpha that don't have the Cat? Then I could go with real dual exhausts with no restriction!!! I have given up trying to find headers.
Alphas don't have the cat attached to the manifold (not a 1 piece item like the 3.5L & 3.7L).
 
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Old 01-18-2021, 03:10 PM
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yea, it is tight under there. I'll find a way!
 
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Old 01-18-2021, 05:59 PM
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All you need is pipe and a bender.

 
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Old 01-18-2021, 06:07 PM
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wish I had a bender
 
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