@ O'Fest, there were numerous cars, presumably the regulars, who had an extra pipe stuck out the back and bent away from the side that took sound measurements. I don't have any insight to help w/ your setup though, hopefully somebody does. You might want to check the west-coast chapter forums.
Closing the loop on this thread... Not a single issue. First session out I maxed out RPMs as I went by the testing station to see if I would be flagged. No problems at all. Great weather, great track, great time. I will be headed back!