how many o2 sensors are on a 93 Z28 camaro? wheres the best place to get them ?

 

I haven't ever looked under one of these, so I can't say for sure, but I would guess 2 as there is only 1 catalytic converter.

 

There are two, but not because there is only one cat. It's that way because the 93s are OBDI. These are located pre-cat. The one on the driver's side is just after the exhaust manifold in the y-pipe. The one on the passanger side is in the exhaust manifold before the y-pipe. Both are one wire units. You can purchase these units online or from Autozone, etc. I used the Bosch replacement ones, though I've heard that they are not the best. Maybe someone on here has a preference and can tell us why they like what-ever brand better. Hope this helps.