NO CATS for OEM S4 B5, with oem other parts
iT HAS PROBLEM? I have bad EGT sensor,after the remove catalysators.

I hope that is only one problem, no ther nexts... what do you think

 

so you removed the cats and got a bad egt sensor code?

If you remove the cats, the code you should get would indicate bad or out of spec rear o2 sensors. There is a way to fool the computer to not turn on check engine light.

If you have EGT code, change the sensor with a new one, clear the code, and then see what happens.

 

So im assuming that you removed the front pre-cats..and you had to remove the passenger egt sensor....or did u not remove it and the heat shield screwed it up? possibly? i woild check that..and yep... if u have a code for that its probably bad...lol...