There are many myths surrounding aftermarket catalytic converters. Myth #1: Aftermarket converters are illegal. Myth #2: Aftermarket converters are inferior to OEM converters. Myth #3: Aftermarket converters void the vehicle's warranty. Myth #4: Aftermarket converters are cheap and low-quality. Myth #5: Aftermarket converters don't reduce emissions as well as OEM converters.

It is important to konw the whole exhaust system in a vehile, such as manifold, muffler, tailpipe, catalytic conerter, etc.