We had to make a trip to my mother in law’s house in KY for a memorial service. We had to bring back a piece of furniture, so we took my truck, a 99 F250 with a V10. As usual, it made the trip without a hitch, We got to the hotel in a big snow storm and parked out front 20 feet from the front door. I got up in the morning, turned the key and was shocked. It ran fine but sounded like straight pipes. Sure enough, someone cut the converter out. It doesn’t have any sensors at the cat or downstream, so a local shop put in a pipe straight to the muffler. The surprise - it sounds like stock and got about 20 percent better mileage (it’s just over 1000 miles). 6 more tanks of fuel and the repair will be paid for and then I’ll be saving money.