The issue we ran into was an HPDE driver in a supercharged K20 swapped late Civic Si hatch. He had no problems when we were at RA in March last year, and got black flagged on sound when we were there in August. I *know* we don't have a sound tech, so it was purely the subjective judgment of one of the corner workers. So, I my post was written from my experience with RA, quiet hours, and noise.