i just got a flowmaster muffler put on my 2000 Jeep Cherokee. it sounds alright but i wanted to take the cat off. My question is if i take the cat off will it make it run bad or throw a CEL? The only reason why i didnt do it yet is cause the o2 sensor is right behind the cat and thats why i thought it might mess some things up. So i figured id ask first so what should i do? thanks in advanced

 

No, it is illegal, and we will not allow it to be discussed here on CF!! Thread closed!!

 

1: yes you will throw a code

2: it's illegal