Do Magnaflow's wear out?

Not just mufflers. So many companies now a days make a person jump thru so many hoops to obtain satisfaction on a warranty it makes it not worth it

I have a magnaflow on my wife's Durango (I'm not a flowmaster fan) it's been on there 4-5 years and it's starting to come apart. I don't remember where I got it. I'm gonna be looking for a replacement soon, probably either replace it with the same or else the dynomax ultra flo