I have a 2007 Audi A4 2.0t, 6 speed. My flex pipe just rusted out and broke off on the back side of it. I found a direct pipe replacement for that part but was thinking of a test pipe or straight pipe for the top part of the down pipe. It looks to have 2 o2 sensors in it and all the direct replacements I can find have only one o2 sensor mount up by the turbo. Since I want to get rid of the cat is there a way to delete the bottom sensor. I'm on a strict budget right now due to just buying the car and a van for my wife. I'm not really worried about the CEL being on (bc it already is for the idle/air sensor) but would like to be able to get rid of it as soon as I can so I will be able to know if something is wrong. Any and all help is completely appreciated.

 

You'd have to have the second sensor coded out in an aftermarket chip to get rid of it completely and clear the CEL for the missing sensor.