I'm receiving my PCD tomorrow. Is there a certain way to install o2 sensor so I don't get a CEL?
I'm also ordering ktuner, however not for another month. I heard I csn disable Via ktuner.

 

the PCD's should come with defoulers...the defoulers act as a spacer.
so, instead of screwing in the 02 sensors directly into the pipe, you screw the 02 sensors into the defoulers and then the whole defouler+02 sensor into the pipe.

 

^^ what justnspace said. I’ve had mine on for a year now and the check light engine light has come in 2 times and cleared itself the next day. I’ll probably just have my tuner take it off whenever I get my custom tune.

 

Yes they come with it. So on my 2.0t I was getting CEL for o2 low input or something. Until I messed with defouler and got the 02 to sit just right . I have not had a CEL since then.
I'm also getting ktuner. And looking for a AWD dyno to get it tuned..

 

sounds like you dont need us. sounds like you know what you are doing