well hey guys im planning on putting an air fuel guage in my 97 grand prix non supercharged engine because i want to see how my fuel is mixing and kinda for show but which one of the 2 o2 senors you recommend hooking it up to get back at me when you have an answer thanks guys i really appreciate it

Hook it up to the O2 sensor in the rear exhaust manifold; this Air Fuel Pigtail will make it easier. Hope that helps!

so your saying the one that is before the catalyst converter or the one under the passenger side on the u bend delete

you plug the A/F pigtail into the front 02 sensor. It is accessable right in the engine bay. They you crimp the wire from the sensor right onto the pigtail

alright man thanks for the adive i really appreciate it

The information from the stock 'narrowband' O2 sensor it pretty much useless, especially in gauge form. The actual decimal voltage reading is slightly useful. For good information you'd need a wideband O2. But hey, for show...