- May 21, 2004
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Because usually they are sold as catback systems, meaning from the catalytic converter onwards including the muffler. In Australia, they would offer catback systems PLUS high flow catalytic converters usually 3" in size. Then the dump and front pipe can either be bought separately and all sorts of companies make them. If you were to go the custom route, you would usually remove the cat converter completely but since most buy at least a catback exhaust, those who are unaware might not think to replace cat converter at the same time. Or like in Perth where I studied, it was illegal and came with a 10k fine.But it is considered as part of the exhaust system right?
I guess from my understanding others tend to assume that during the exhaust upgrade, decat-ing have not took place yet.
Does this help?