Originally Posted by Happy

Correct, there are no resonators. I’ve only used a resonator on one of my custom cars, a 1988 Honda Civic Hatchback. I had a full race setup, and I did not want to receive attention.

On my E53, there is little to no drone with the windows down, and none with the windows up. Like Clockwork said, E53’s M54 is quiet, and I like to be able to hear my engine. It’s not super loud, but it’s definitely not quiet.