Went to autozone for new O2 sensors and they had 2 different ones for the 1995 z. they both had 4 wires but One had a rectangular wire harness with the wires already on, and the other had the 4 but no harness attatched. The one with the non-harnessed wires comes with a Square wire harness that you hook up yourself with 2 on top and 2 on bottom. the other one had the 4 wires lined up 4 wide. SO.... which one do i need?

 

flat is for the front, square is for the rear (after cat). You have 4 O2 sensors.

 

Someone told me on a single cat 1995 there were only 2. one before the cat and one after. and since i dont have a cat. does it make a difference?

 

If you have a single cat, you've got 2 before the cat, none after.

 

My bad, I was thinking for dual cat. Sorry.

 

OK. so if i have 2 before the cat will they both be the same with the harness and the 4 wires in a row?

 

my single cat 93 has 2 wires.. but i think you might have heated O2's? Thus the 4 wires..