you can have "huge" mufflers but they will send u epa notices for it guy above is dreaming they always go for the muffler if its loud.
yes the cars are street legal given they will supply you witha RWC, doesnt mean the exhaust is EPA legal for example. Once you change stuff its on your own head too, which inevitably you will. Also why go through dealer the used car market is prime for the taking..
seller should provide you with a RWC.. i wouldnt buy a car without one to much head fk gettin one.
engineers cert is a waste of time, assuming your in victoria