Muffler on the 02 had holes in it by 2010, 135k. It got replaced 2 years later and the replacement is failed in the same manner.

The y pipe and converter are not looking so great but until its cracked and broken through its staying.

Factory exhaust is usually 409SS, it will still rustout just somewhat slower than any aftermarket aluminized junk. Daimler pinched pennies wherever it would show the least.