Pretty sure Pedders are completely Australian made.

DT Performance is a pretty big here in SA, despite only have one shop based in Salisbury, and there is one in Darwin.

Check em out! :: D&T Performance Exhaust Centre ::

These guys have about 12 project cars, ranging from Holden Commodores, to Ford Falcons, to Lancers, Hummers, Audi's. These guys are pretty bloody good. I got my exhaust done by them. That was 3 years ago, and they still remember my car.