Recently was driving a saw cloud of smoke behind me when leaving a stop light. Have had a Cel for the past month. Got P1283 and P0441. Did a data stream of the 02 sensors but not very knowledgeable on how to tell if the 02 is reading good on a Graph. Car is mostly stock with 125k miles.

Has Z1 Test pipes
spec D true dual exhaust
unknown brand aftermarket headers.

 

The O2 sensor will fluctuate after being heated to operating temperature. If the O2 sensor is 'lazy' when you rev up the warmed up engine, then it means it probably retired.
Since you have no cats then the downstream sensors will not read properly and are basically overloaded with unburned fuel and will foul sooner than expected.

I had that smoke issue in my 2005 Chrysler Town and Country where i gutted out the cat and installed the downstream O2 sensor into a anti-foul adapter which worked but MPGs were cut by 20-30% and the smell of nasty fumes around it made me spend that $160 on a new cat and no more nasty exhaust smell, no more white smoke when pulling from a red light and MPGs went up drastically.

Honestly, if you have a naturally aspirated engine, then the cats don't really rob that much power unless you track the car and don't mind the lounder cabin noise, nasty unburned exhaust smell, check engine light and poor fuel economy.. Unless you run a custom tune that eliminates the downstream O2 sensors, you'll be seeing more smoke..