Cat delete o2 defouler stock ecu

[Graphic]

Has anyone deleted all the cats and ran an o2 defouler on a stock ECU untuned? Is it possible to do this without throwing a code? If not why? I swear I read there have been some people who've done this with success.

I purchased some 90 degree o2 defoulers that are catted and inlet size is reduced.

I swear I read someone successfully doing this in the past. I've also read someone saying it's not possible.

[DZnutz]

Each car will be slightly different. Try it and see

[Arizona Vipers]

It's been done, you can find it if you search here. But then other guys say it didn't work for them... If your warranty is already expired just use HP Tuners...

[Graphic]

Good to know. I swear I saw someone be successful here but I couldnt find it again. It might come down to different o2 defoulers I'm thinking