Is it acceptable for a vehicle to be without resonators?

The answer is that it is acceptable for a vehicle to be without resonators if the muffler is present. A vehicle's exhaust system can function effectively with just a muffler, which primarily serves to reduce noise and emissions. The resonator, on the other hand, is primarily used to fine-tune the sound of the exhaust and can contribute to a smoother exhaust flow.

In many instances, especially in custom or performance exhaust systems, drivers choose to remove resonators to achieve a desired sound or to modify the exhaust flow characteristics. As long as the muffler remains intact, the vehicle can still operate legally and effectively within noise and emission standards set by regulations.