Hummer Exhaust
 

Does any body make an off-road exhaust or test pipe to eliminate the cats? Also what would need to be done to the computer if removed for off road use only? 2006 H2 SUV

Re: Hummer Exhaust
 

I may be wrong about this, and please correct me if I am, but I dont think there is a "test pipe" or cat eliminating pipe sold for the H2. I think it is just gut the cats or cut them out and put in a piece of exhaust pipe.

As for what to do oce the cats are out and the computers goes hey wtf????
There is a O2 sensor replacement that causes the computer to not see the lack of the cat. For the life of me right now I can remember exactly what it is called....
Having a senior moment

Hope this helps

Re: Hummer Exhaust
 

If it comes to you, let me know please. I would assume it goes in the bung after the cat, right?

Re: Hummer Exhaust
 

O2 sensor simulator

and yes