WIKD

I am getting ready to install a MAC o/r h pipe in my 2004 Mach 1 and have a few questions. After searching for a while I figured it would be easier to ask here since I wasn't finding what I need.

First off I believe I'll need o2 sensor extensions. Is Autozone or the like the best place to look or do you need to go somewheres else?
Also how long of an extension is usually needed?
Should I use both the front and rear?
Why do some of you eliminate the rear ones and what does the MIL do?
What happens if I hook up front and rear o2 sensors?

Thanks for all your help guys. just trying to go into this project with all the knowledge I need and all the right parts to get the job done.[/align]

boduke0220

I didnt need the 02 extenions.
The MIL eliminators tell the computer that there is a cat on the car, when obviously there isnt.
Hook up the front sensors and put the MIL's on the back....thats what i did

jmac72187

You didn't need them because you have an 03. They are needed on the 04.

I would look on american muscle for the extensions.

You don't need to touch the front o2's. They are in the headers for the A/F ratio.

If you don't put MIL's in or turn the rear o2's off with a tuner, the CEL will come on and you will not be able to pass inspection.

WIKD

OK so the extensions are for the rear o2 sensors which is also where I need to tap in a MIL eliminator right?
Next question is where do you get a MIL? Seems like everyone quit making them.

jmac72187

Yes and yes.

You can make your own for about $10. I don't have the link but search around and there some instructions.

boduke0220

latemodelrestoration has them..they did a few weeks ago anyways.

WIKD

Thanks guys.

trojenhorse

+1 latemodelresto.

KillaGT

I recomment take it to the muffler shop, and let them install and weld 2 peice together. I just got my done yesterday and I like it. my check engine light not on yet !!