My 5 year old kitty got run over the other day and I wanted to have it stuffed. Just kidding. I want to get an off road pipe, but then decided it would probably be less noticeable legally speaking and warranty wise if I just gutted the cat. Has anybody ever done this? I was just wondering if anybody had a how to or some simple instructions for me.

dont do it, neither of them. The risks outweigh the rewards. as others will undoubtedly tell you, the cost of a emmissions ticket can be quite high (ignore my sarcasm, its late and im pulling an allnighter). Just stick with an aftermarket exhaust and be done with it.

Yeah, though the ORP makes it visibly obvious that you are sans-a-cat, at least during inspection time you can switch back to the cat (because you would not have gutted the poor thing - REEEEOOOOOWWW!!!!!!!).

Well I figured gutting it would be the best thing as far as warranty work goes since it would look as if I still had a cat. We dont have inspections here though so I am not worried about that.

If you gut the cat the mechanics will know exactly what is up so wanting to do it for warranty work is moot. It will be louder than bombs and give off a distinctive smell. Best bet is the ORP because switching it out back to stock is faster than doing an oil change. A cat cost an assload of money while the ORP can be had sub $200. Not to mention that if you gut the cat I would think that you would still need the $3x rear O2 cheater that is included with the ORP.

Yeah if you gut the cat you still need a MIL eliminator on the rear O2 sensor. If the Ford tech doesn't notice the smell or added exhuast loudness, he may still notice the MIL elim.

However, you might be more likely to fool a cop with a gutted cat.

gutting that cat can make the car run like ass too. almost indoubtably.

get the ORP and just swap out if you ever need service.

Did that to my 93 Probe GT back in the day, car would blow out dark smoke when you hammered the gas, and it smelled like stank ass, not a good idea, I did it once and only once hehe

yeah, get the ORP, and swap it for emissoins

If you gut the cat, you're probably going to lose power. Gutting the cat results in a very turbulant exhaut flow through there and will actually be more of an obstruction than just leaving the cat as is. So I'd suggest either getting the ORP or just leave the cat on.

Instead of getting a ORP, have a shop cut off the stock cat and put in a hi-flo cat.

Yah Dingaling, I know your thinking cheap mod right now, but the High flow cat is going to be the best bet for you. Unless you are planning on the Forced Induction with it. People don't understand the damage a ORP causes on a NA motor. On a FI motor you haft to get the heat away from the head as quick as possible hince the free flowing exhaust. But the person with the FI will not have a Daily driver or an engine after 60K miles, before they rebuild it. Man I could get into some deep shhh and physics with it but that would be One heck of a write up and I don't feel like it.

Suppose there is no choice, you will need the O2 cheater and a straight pipe to shove down the center of the cat to get rid of the turbulance in the hollow chamber of the cat.