Just a quickmnote about stainless steel boxes, they are noisier than a steel box of the same wall thickness. a good manufacturer will use double thickness sheets on the boxes. Here are a couple of shots from the trip around JP exhausts a few months ago.
Coupe Exhaust
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and the stuffed box ready for the end cap to be welded on. you can't see the double sheets thickness I'm afraid.
DavidAttached FilesComment
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alternatively you could try a 'ernst' stainless steel exhaust...
they are a german company that have made exhausts for audi themselves and these exhausts are available from german and swedish...
reason i suggest it is it looks exactly like the one you show in the picture
back box is £110
Russ
have 5cylinders, quattro and 20 valves, but no turbo yet
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