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.

H3 Headers

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Old Apr 18, 2011 | 09:43 AM
  #1  
Kurtis Cleere's Avatar
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Default H3 Headers

Has anyone put headers on a H3 I5?
 
Old Apr 18, 2011 | 12:34 PM
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u can search, im guessing from memory.
i think theres a cat built in the exhaust manifold. prob cost a fortune in headers,or impossible,or,maybe it was $2500
 
Old May 1, 2011 | 10:19 PM
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wouldn't The headers from a colorado I5 fit?? I think JTR has a I5 header
 
Old May 3, 2011 | 11:24 AM
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I think the cat setup on the Alpha is different......but I would like to get new headers because I think there are pre-cat's on the headers, and I would love to get rid of those, I just don't know if any headers would even fit......

It's raining far too hard and I'm far too lazy to go look.
 
Old May 3, 2011 | 02:22 PM
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What kinda of bennefit would you get on removing the pre-cats?
wouldnt that effect emissions?
 
Old May 3, 2011 | 06:10 PM
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Originally Posted by zefrum
What kinda of bennefit would you get on removing the pre-cats?
wouldnt that effect emissions?
Better exhaust flow, if your truck is running right you shouldn't need them to pass emissions, at least not there in Ohio.
 
Old May 20, 2011 | 10:04 AM
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How about an open header no exhaust at all. Raw power
 
Old May 21, 2011 | 09:05 PM
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Hello,
Let me know if you do put headers on. I am going to on mine, found some longs (No Cat) and was wondering if they are worth the cost?

Thanks,
John
 
Old May 23, 2011 | 11:44 PM
  #9  
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Originally Posted by 2wheelmonster
How about an open header no exhaust at all. Raw power
Yeah that will sound sweet as **** when my vtec kicks in.

I bet an open header alpha with factory nerfs will pull 12.0 quarter miles.
 
Old May 24, 2011 | 12:43 PM
  #10  
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Anyone have them on their Alpha or know who makes them? Like to get those pre cats off my self.
 



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