Drone is a very narrow frequency that doesn't have anything to off set it. In other words you only hear the one single frequency and that's it.
When you dump under the truck that frequency causes the body of the truck to vibrate at the same frequency as the exhaust. When these two noise...
the front of the catback is different too.
I suspect that we built our prototype around a truck without running boards unknowingly. The scab is so much more rare we haven't done a system for one in forever so I just need to do a quick test fit to confirm that we aren't going to hit the running...
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