Here they are:
'85 Porsche 911 with M&K exhaust
'86 Suzuki GSX-R1100 with D&D exhaust
'95 Ducati 900SS/SP with D&D exhaust
'08 Ducati 848 with Termignoni exhaust
So that's the current stable. I'm not going to bother with clips of the GTI or the R1 as they both still run stock exhausts and honestly, while they can be exciting to drive and ride, they're not that exciting to listen to :-)