Guess I'm in here then
I was 22 when I fitted the Nur Spec, Ichiba y-pipe & ebay decats.
Then a few months later I cut the silencer out of the Nur Spec & y-pipe & replaced them with straight pipes - and swapped the decats for HFC
Then at 23 I switched to a GReddy single
Then after about a year I'd switched to a set of japspeed decats & removed the silencer from the Greddy and fitted DC headers.
Then I fitted a supercharger & switched to Tomei decats