The other day my 01 Ody started to sound a little throaty, ok a lot throaty. I was hoping it was not the Cat, and it wasnt. The gasket in the flange was gone, must have rotted out, the nuts and bolts were rusted beyond recognition. This was the flange on the rear of the cat. I had to bring it in, went to Meineke, the cut off the old flange from the cat and the exhaust and welded in a flange "kit", cost $200, glad it wasnt the cat.