downstream O2sensor response with high flow CATs

[Daniel Souza]

Has anyone logged the downstream O2 sensors after installing the high-flow cat ?
I just installed a 200 cell one on my LS3 and it is reading basically the same as the pre-cat sensor.

 

[lmoengnr]

Has anyone logged the downstream O2 sensors after installing the high-flow cat ?
I just installed a 200 cell one on my LS3 and it is reading basically the same as the pre-cat sensor.

That sounds about right.
The downstream sensors are usually disabled in a tune.