In 2002 I bought a stainless 2 1/2" turbo muffler from VW speedshop. It's still going strong now. Thanks VW speedshop for supplying a quality bit of kit!
I think his are still made out of the same stuff now as they were 15 years ago, so I assume so I wish id also gone for a stainless 4 into 1 at the same time!