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My cat came apart at the seam and I replaced it with a straight pipe. I can't tell any difference in the sound or the gas mileage. Your result could be different.
^ So yours was gutted before you put a pipe through it?
It was never gutted by me. It could have been stopped up. I got on the truck hard, heard a light bang, and then the cat was rattling. I removed it and put a straight pipe on it.
