I'm guessing the pao never came with a cat to begin with
You can try getting hold of a late k10 (91/92) exhaust system as they had a cat fitted as standard you'd need manifold, cat and downpipe
Ok so wheels were clean (ish), now on Charlie as I sold the RS5's
Since the last update I've fitted the front nismo splitter, just waiting on some industrial double sided tape for the spats and rear splitter (this was done a week ago)