loud. It emits that low end rumble. In my parkade, the heating vents rattle. Thru the winter, I would periodically start my car up and drive it around in my parkade to keep the top end and seals lubricated. I always set off alarms. If it isn't the exhaust, it's the stereo.
As a side question - How many people here turn down their stereos just to listen to their cars? I'm beginning to think my stereo was a waste of time.