The o2 sensor should go where the pipes merge, before the cat.

If you would like, I have the correct Y-Pipe for a 94 4.3L CPI sitting in my garage.

 

The o2 sensor should go where the pipes merge, before the cat.

If you would like, I have the correct Y-Pipe for a 94 4.3L CPI sitting in my garage.

thanks but I already have the exhaust on the truck but I just need to find out if the 96' 4.3 liter exhaust o2 sensor hole is in the same spot where it needs to be for my 94' 4.3

the plug on my truck doesn't match up to the one on the exhaust. So I was thinking that if I go to the parts store and get an o2 sensor for a 94' and put it in on the 96' exhaust if that would work?

thanks for all of your help and Mabey I will have to buy that Y pipe from you

How much for it with shipping?

 

I was looking for 20 + shipping, shipping will probably be around 15 to In. It's pretty big. No reasonable offer will be refused. It's collecting dust in my garage.

If you want, I will post a picture of where the 02 sensor goes.
http://www.putfile.com/pic.php?img=6645854

I think the only problem is the 96 cat has a different flange on it.

 

if the 96 is the same as 97 it has 2 sensors on cat and 1 on each exhaust manifold.(total of 4)

 

does that mean that I will need to get a new cat. too or can I just change out the o2 sensor where the exhaust manifold pipes connect.

 

You should just be able to install the one 02 sensor in the rear hole of the 96 Y-pipe and plug the rest of the holes.

 

thanx for everyones help!!!!!!!!