Part numbers from an old Staintune catalog.
The pipes and collector were sold separately and both options fitted the stock exhaust system, so you could upgrade just the pipes, both or just go cat free with stock pipes.
TR MS ROC 3P
2004 onwards Triumph
Rocket III / 3 replacement slash cut style mufflers Removable Restrictors SET Au$1,785.00 (US$1350)
TR CB ROC 3P
2004 onwards Triumph Rocket III / 3 into 3 Performance Spaghetti Collector Each Au$800 (US$600)
Total NEW price Au$2585