A resonator is a chamber in the exhaust system that contains a specific volume of air that is designed to cancel out certain frequencies of sound made by the engine; essentially reducing or hiding the noise that the engine is producing.

What does a resonated exhaust mean?

The resonated exhaust system has an additional silencer which runs through the centre section. ... The non resonated exhaust system has a straight pipe through to the back box allowing for the sound to pass straight through from the engine giving you the loudest, rawest experience.

What does a resonator do for exhaust?

Parts like catalytic converters came along to help reduce toxic gases and pollutants, and others, like resonators, were added to help control noise coming from vehicles' exhaust systems. A resonators' sole purpose in life is to change a vehicle's engine noise before it reaches the muffler for a final decibel reduction.