I have a 87 IROC-Z with a 350 tpi. I added slp 1 3/4 headers to it, and ever since i felt like the car didn't run as smooth. Then this week I seen a O2 sensor for a car with headers. Is this something that shoujd be running rather than a stock sensor.

 

The 02 sensor you saw is probably just a plain ol sensor. I know that's what I've been running and lots of other people are too. Unless it's a heated sensor and then you can convert your to run a heated sensor. No biggie.