mee tooo anyone find anything out

 

I have put one on mine

 

Hi all I need help. I just received the headers from hummerparts for my H3 3.7 and I would like to install it. The header has 2 holes for the o2. It looks like a new model with 2 holes for the o2 sensors (the old header has only one hole for the o2 sensor). I also received the vibrant o2 extensions ( Vibrant part # 11621 or 11619 ), do you know how to calibrate these extensions. . .? Should I use both of these extensions or just one for the lower o2 sensors? I can see they have 3 port size: small, medium, big.... what do you think I have to use? Last thing, they did not ship the garnish of the header... probably I will be able to use the factory one?

 

I moved this from the archive only old sections..... where it says "Please do not post in this section" so you guys that want to continue resurrecting a nearly two year old thread.

 

yes, JTR make headers for the Colorado, which fits the hummer h3, $385. free shipping

 

I put a header on my 06 H3 many years ago. Had a SS dual; exhaust on to improve performance.

Any one want to buy my old muffler system?

The header did provide a slight improvement in performance
There is only one o2 sensor port on mine. The header does make changing the o2 sensor a challenge to change when it fails.

 

that's why I don't put header on because of the o2 sensors, I want the sound from the header, more than performance. Thanks for the info.

 

You just dug up a 7 + YEAR OLD Thread? Let's please avoid that form here out. READ: Old Threads/'Necro-Bumping'