Meerkat Exhaust Mod

[Eisenfarn]

Hi guys, I've bought a used exhaust so I can make the Meerkat mod to it without the chance of fu**** up my original, I've got the ver 2 PDF from Pete at Meerkat Mufflers and I've looked at Magoo69's post on the subject, so pretty confident. Only thing I have a question about is the mention in Magoo69's doc on the handling of stainless steel in his page one, are these exhausts actually made of stainless steel or are they mild steel?