Do Magnaflow's wear out?

Car Nut said

Magnaflow mufflers shouldn’t wear out, they have a lifetime warranty.

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LMAO. That sure as heck doesn't mean they shouldn't wear out. Any muffler with "mesh" and fiberglass in it will burn out over time. A warranty has zero to do with whether or not something goes bad. All that means is you can get another one.