Has anybody gotten rid of the Cat on an 05 and found any difference in fuel mileage? I see there are no front and rear sensors on the pipe so I talked with my service manager today and he said there should be no problem replacing it with a pipe. I haven't been able to find anybody around here that can bend up 4 inch pipe. Does anybody know if there is a replacement pipe out there somewhere? I have heard of guys taking the Cats out and punching a big hole in the inside and then reinstalling it but I don't want to do that. I want to be able to put the Cat back on when I deal the truck in two years. Thanks for any advice or ideas.