LNF catless downpipe and second O2 sensor question

[TurboCobalt]

hello,
Recently i bought a ZZP catless downpipe with a standard O2 bung. I didn't realize it at the time, until i took off my stock downpipe but the O2 bung was about 6-8 inches further back on the ZZP downpipe and my stock second O2 sensor won't reach. I'm guessing they sent me a pipe that was meant for a "aftermarket wideband o2 bung" which i didn't want.

I know with a catless downpipe i'll have to turn of the P0420 code for Cat Performance. However, if chose to run without the second O2 sensor i have to turn off all the other codes: P0137, P0138, P013A, P013E, P0140, P2232, P2270, P2271 which are on that sensor.

My question is: If i run without the second O2 sensor, will it affect the car; I'm guessing fuel trims?

I know the main purpose of the second o2 sensor is to determine cat performance, but i also know for a fact that it can (and is) used for fuel trims (to a small degree) in certain controllers.

[codename Bil Doe]

I road race with no cat or 2nd O2 and have no problems.

[T-Man]

Let the codes pop and disable them as they come. No need to arbitrarily disable codes if they aren't popping a MIL.