Hey guys,

Ok so as the title says I am looking at removing my cat from my 99.5 a4 1.8t and putting in a test pipe for better flow, I am also purchasing a borla exhaust my only concern is what will happen if I remove the cat? Will I get any lights coming on in the dash? Will there be any harm to my engine. Any help is appreciated

Thanks

 

Search search search!
Some keywords:
Testpipe
O2 Spacer
Cat delete

If you give up, then PM me. Running a TP currently.

 

You're going to throw a CEL because the cat is gone... You need to do the antifouler mod. Try searching that too. There is an excellent DIY out there on the interwebz somewhere...

 

I did a full write up on this.

Go to the DIY section

 

Make your life even easier.
https://www.audiforums.com/forum/sho...d.php?t=141986