Sounds cheap to me, S/S exhaust are made for d.....ls Andy :D
Have been looking at doing mine, most of what I've seen on forums has said that, S/s systems by the main suppliers aren't that good, meaning they are not made of very good quality and soon lose thier colour.
I have a centre/rear section which is surposed to be S/S, but has rusted/discoloured quite badly. will have a look for the info I found as soon as I can mate.