2 1/2" or 3"

I have never been a fan of DynoMax mufflers. I have a set on a truck once. They rusted out around both inlet/outlet pipes. There was no other rust on the mufflers anywhere else and they weren't that old.

I'm not saying your experience was false but how does stainless steel rust? Was they really Dynomax?

http://www.dynomax.com/mufflers.php?muffler=ultraflowelded