I have read a lot on here but I have not found the answer to my questions on this. I have a 99 with only 1 cat and 2 oxygen sensors. One sensor before the cat and one after. The sensor before the cat is for A/F and the one after the cat is for detecting if the cat is working. Someone correct me if I missed something so far. The PO cut the cat pipe really short and didn't leave me a lot of meat so it's hard to keep the tail section on with out leaks. The cat is also in bad shape. Where I'm at my emission test is visual only. The question is, if I don't put a cat back in, will this set off a CEL and if so does it matter and can it be turned off/tricked so I don't have to buy another cat. I want to redo the cat pipe and I already have a new muffler and tailpipe. Just trying to see what I'm budgeting for. Thanks in advance.