· Super Moderator
Most cars have stainless steel exhausts and either stainless or aluminized carbon steel mufflers. Walker makes both kinds of mufflers. Stainless is far more expensive, but Rockauto has some of them far cheaper than the parts stores. I find that what fails on my cars is the carbon steel exhaust pipe right in front of the muffler, so that I have to replace everything from the cat-back, because of one rotted spot.